52 g Volume of NaOH to neutralize the KHP solution7. 99 g Mass of KHP0. Percent concentration by mass is defined as the mass of solute divided by the total mass of the solution and multiplied by 100%. Percent acid is defined as the number of grams of acetic acid per 100 mL of vinegar. How many aluminum (Al) atoms are in an aluminum can with a mass of 16.2 g? Many types of vinegar are available, depending on How many grams of glucose must be added to 275 g of water in order to prepare percent by mass concentration of aqueous glucose solution 1.30% ? How many grams of #NaOCl# are in the solution? Although its only a one percent difference in acidity, it actually results in cleaning vinegar being 20 percent stronger than white vinegar. Which sound will reach your ear first? Harvard T.H. Calculate the percentage purity of #H_2O_2#? 0.543g of CaCl2 was dissolved in enough water to make a 500ml solution. For titration 0.04356 L0.1023 M=4.45610-3 mole of base was used, so there was 4.456 mmole of hydrochloric acid in every 25.00 mL of solution taken from the volumetric flask. A 45.0g aqueous solution is made using 10.0g of ethanol. Eduardo wants to make 17.1 fl. Mass percent composition or mass percent is the percentage by mass of each element in a compound. How much would a dosage of 12ml 10% Potassium Iodide (KI) w/v solution increase Iodide levels in a total voluve of 800 liters? How many atoms are in each elemental sample. When volume is reduced, the particles have less space in which to move. Sample A has a lower molar mass than sample B, so a given mass of Sample A has more moles and therefore more molecules than the same mass of sample B. Acetic acid is a weak acid but its concentrated form is corrosive and can cause some damage to the skin. Home Topics Cleaning Cleaning Products. Ask your instructor for the true mass % acetic acid in your vinegar sample. What is the percent concentration formula? A bottle of wine contains 12.5% ethanol (#CH_3CH_2OH#) by volume. A 5.54 gram sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the weight per volume method to calculate concentration? The molecular mass of albumin is 60 kDa. what will be the actual concentration in the solid sample? Explain. It is known to be the active component of vinegar, which is a 4% 7% solution of acetic acid in water. How many mililiters of Isopropanol are in 62.4 mL sample of the alcohol solution? Vinegar can be as much as 7% acetic acid, which can cause serious dental damage. How much water should be added to make the solution 14% salt? Hydrogen chloride (HCl) ionises fully in water into hydrogen ions and ions of chloride. Butane is a compound containing carbon and hydrogen used as a fuel in butane lighters. How many grams of NaOH are dissolved in 22.75 mL? A 1.45 g sample of phosphorus burns in air and forms 2.57 g of a phosphorus oxide. How many pints of each 2 percent and 7 percent acid solutions must be mixed to obtain 50 pints of a 5 percent solution? Determine the number of moles of C in each sample. The abnormal warty tissue turns white and can be better distinguished from normal tissue. While its true that undiluted cleaning vinegar is great for killing some germs, including E. coli, be cautious when using it for disinfectant purposes. One mole of hydrochloric acid reacts with one mole of NaOH. "It may have some benefits to our bodies, but overall, we need more studies to truly understand the health benefits and side effects associated with ACV.". What is the mass of solution that would contain 1.00 g of KCl? Find the number of CO2 molecules in a sample of dry ice (solid CO2) with a mass of 22.5 g. Atomic Mass of CO2 = 12.011 + 2(15.999) = 44.009. Report - Titration - Determining the Concentration of an Acid (2pts) Titration - Determining the Concentration of an Acid How will you collect data for this experiment? Food labelling can provide consumers with the information they need and desire to make food choices. A May 2018 meta-analysis from the Journal of Evidence-Based Integrative Medicine suggests that the regular intake of vinegar may lead to a small reduction in glucose levels. A 3.24 g sample of titanium reacts with oxygen to form 5.4 g of the metal oxide. Data: Part A - Standardization of a Sodium Hydroxide Solution Mass of beaker97. What is the mass percent of a solution that is #10.5*mol*L^-1# with respect to #NaOH#, and for which #rho_"solution"=1.33*g*mL^-1#? How many millilieters of a 12% (v/v) propyl alcohol solution would you need to obtain 5.7 mL of propyl alcohol? You can also purchase cleaning vinegar on Amazon. Report - Titration - Determining the Concentration of an Acid (2pts) Titration - Determining the Concentration of an Acid How will you collect data for this experiment? Even though it contains a few acids, they must rinse off more readily than vinegar. How many milliliters of alcohol are in 167 mL of an 85.0% (v/v) alcohol solution? Note: You may have needed to perform more than three trials to achieve good agreement among three titrations. Acids carry away the minerals in your teeth, weakening enamel and potentially leading to cavities and other problems. How can I find percent concentration from density? When did Ariana grande lose her virginity? Many people tout vinegar for its health benefits and promise to aid in weight loss, but available research isn't abundant. As a matter of course, oxalic acid is a chemical element. Given: HC2H3O2 Find: Mass % of O. How can the concentration of a solution be increased? And just like other types of vinegar youre used to, its nontoxic and environmentally friendly. Report - Titration - Determining the Concentration of an Acid, (2pts) Titration - Determining the Concentration of an Acid. A solution is made by dissolving 3.60g of sodium chloride to a final volume of 115mL solution. Apple cider vinegar likely won't hurt your diet, but also "won't replace a healthy lifestyle," Edwin McDonald IV, MD, wrote for the University of Chicago in August 2018. Chem. What is the concentration of Cl- in %w/v? There are also vinegars made from beer, sugars, rice, and other How many grams of solute are present in a #"1500-g"# sample of a #3.62%# by mass solution of sodium hypochlorite? A solution is made by dissolving 3.60g of sodium chloride to a final volume of 115mL solution. How come analysis of commercial bleaching solutions will often show a lower #OCl^-# ion content than is advertised on the bottle? Percent acid is defined as the number of grams of acetic acid per 100 mL of vinegar. A pharmacist has one solution that is 40% iodine and 60% water, and another solution that is 3% iodine. Calculate the mass of acetic acid The density of acetic acid is 1.05 g/mL. How much pure acid must be added to 6 milliliters of a 5% acid solution to produce a 40% acid solution? Determine the mass of oxygen in a 5.8 g sample of sodium bicarbonate (NaHCO3). Up next, check out these money saving vinegar cleaning hacks. Calculate the number of moles of solute present. A compound containing carbon and hydrogen has a molar mass of 56.11 g/mol and an empirical formula of CH2. If you have an extra dirty job to tackle, like a greasy stove top, use the same spray bottle solution but add one tablespoon of dish soap for extra cleaning power; then shake to combine. In most cases, cider vinegar and apple cider vinegar refer to the same thing. Hence percentage concentration of ethanol by weight of mixture is? How do you find the concentration of a solution in ppm? What is the summary of the poem tiger tiger revisited? What is the mass of 4.78 X 10^24 NO2 molecules. Overripe fruit, for example, is broken down by yeast and bacteria to produce acetic acid, or vinegar. Percent by volume = #"volume of solute"/"total volume of solution"# 100 %, How would you prepare 250 mL of 70 % (v/v) of rubbing alcohol, 70 % = #"volume of rubbing alcohol"/"total volume of solution" 100 %# 100 %, Volume of rubbing alcohol = volume of solution #"70 %"/"100 %"# = 250 mL #70/100#. Mass Percent of Acetic Acid in Vinegar. Table of Contents. Where not less than 92 percent of the hydroxyl groups are acetylated, the acetic acid process or the methylene chloride process are usually used for acetylation. If you performed more than three titrations, you will only enter the three best trials here. Acetic acid (found in vinegar) is a weak acid and is very common. Where not less than 92 percent of the hydroxyl groups are acetylated, the acetic acid process or the methylene chloride process are usually used for acetylation. Overripe fruit, for example, is broken down by yeast and bacteria to produce acetic acid, or vinegar. Calculate the mass percent composition of O in acetic acid. of Brand B fruit drink which contains 48% fruit juice. USSR (Engl. Mass Percent of Acetic Acid in Vinegar. Who were the siblings in Fred Claus' Siblings Anonymous group besides Roger Clinton Stephen Baldwin and Frank Stallone? 99 g Mass of KHP0. A 5.00 mL sample of a solution of KCl (Mwt=74.6 g/mol) in water (Mwt=18.01 g/mol) weighs 5.20 g. The water is evaporated off leaving 0.26 g of residue. What is the mass% of HCl in the solution if 150 mL of the solution contains 30. g of HCl? How many grams of solute are present in #"2500 g"# of a sodium hypochlorite solution that is #"5.24% m/m"# ? In fact, one small study found limited amounts of vinegar reduced blood sugar levels by over 30 percent after 95 minutes following consuming simple carbohydrates like white bread. When acetic acid or ethanoic acid is not diluted then it is known as glacial acetic acid. What is the percent concentration of sodium chloride in normal saline? Compound A has a molar mass of 100 g/mol and Compound B has a molar mass of 200 g/mol. What is it molecular formula. Be sure to report answers with the correct number of significant figures. ORL-RAT LD50 1780 mg kg-1, SKN-RBT LD50 4000 mg kg-1, DANGER: CORROSIVE, FLAMMABLE, burns skin and eyes, P210-P260-P303+P361+P353-P305+P351+P338-P405-P501a, Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately, inhalation, ingestion, skin and/or eye contact, Conjunctivitis, lacrimation (discharge of tears), corneal edema, opacity, photophobia (abnormal visual intolerance to light); nasal, pharyngeal irritation; cough, dyspnea (breathing difficulty), bronc What percent water would it contain? Emily mixed together 9 gal. It is Acetic Acid, a strong vinegar. Once the juice has reduced by a third or a half, pour it into a wooden barrel and store the barrel somewhere safe for 12 years, which is the minimum amount of time needed for the juice to turn into acetic acid. Calculate the mass percent composition of O in acetic acid. What is the mass percent of NaCl in the solution now? White vinegar has 5 percent acidity; while cleaning vinegar, on the other hand, has 6 percent. Let medication do the job. A molecular formula is a formula for a compound that gives the specific number of each type of atom in a molecule. Divide the number of moles of solute by the number of litres of solution. 3. Percent by mass (m/m) is the mass of solute divided by the total mass of the solution, How many grams of acetic acid should be dissolved in 100.0 g of water to make a 4.0 percent (by mass) solution of vinegar? A sample of seawater contains 6.277 g of sodium chloride per liter of solution. How many liters of pure acid should be added to 25 liters of a 60% solution of acid to obtain a 75% acid solution? If 250.0 mL of a 0.96 M solution of acetic acid (#C_2H_4O_2#) are diluted to 800.0 mL, what will be the approximate molarity of the final solution? What is the mass of solution that is #28.1%# #"(w/w)"# with respect to sugar that contains #65.5*g# of solution? Acetic anhydride [ACD/IUPAC Name vinegar-like odor. 20mL of orange juice (citric acid), weighing 20.31g, was neutralized by 20.4mL, 0.0900M of NaOH. Acetic Acid (HC2H3O2) is the active ingredient in vinegar. White vinegar has 5 percent acidity; while cleaning vinegar, on the other hand, has 6 percent. CSID:7630, http://www.chemspider.com/Chemical-Structure.7630.html (accessed 06:09, Nov 8, 2022), Validated by Experts, Validated by Users, Non-Validated, Removed by Users, Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, Predicted data is generated using the US Environmental Protection Agencys EPISuite, Click to predict properties on the Chemicalize site, For medical information relating to Covid-19, please consult the. What is percent by mass of #AgNO_3# in the solution? If the mole fraction of #"K"_2"SO"_3# in a solution is 0.0328, what is the percent by mass of #"K"_2"SO"_3#? For a constant supply of vinegar, pour 1 quart (4 cups) of wine and 1 cup of the mother vinegar into a wide-mouthed glass jug with at least 1-gallon capacity. Vinegar is a combination of acetic acid and water made by a two-step fermentation process. Compound A. Can Drinking Distilled White Vinegar Help Me Lose Weight? The concentration of aqueous methanol is 10% of its mass. $$ What is the mass/mass percent concentration of #NH_3# (17.04 g/mol)? Which compound has the highest mass percent of O? How many grams of sodium chloride can you consume and still be within FDA guidelines? Experts are tested by Chegg as specialists in their subject area. It is known to be the active component of vinegar, which is a 4% 7% solution of acetic acid in water. The acid in vinegar is what cuts through grease and grime, removes sticky residue and fights soap scum. For the most part, "cider vinegar" and "apple cider vinegar" ($5.54 for 16 fl, Amazon.com) mean the same thing in common usage. A farmer has 100 gallons of 70% pure disinfectant. A silver ring contains 1.1 X 10^22 silver atoms. formula used No of moles of sodium hydroxide. How many grams of HCI are there in 100.0 mL of concentrated HCl which is approximately 12.1M and 37% HCl by weight and the density of 1.191 g/mL? A 5.54 gram sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. Data: Part A - Standardization of a Sodium Hydroxide Solution Mass of beaker97. But this brush-on formula saves time and effort. Acetic anhydride [ACD/IUPAC Name vinegar-like odor. 535 M NaOH Part B Determination of the Concentration of If you have 20 mL of alcohol n a 100 mL solution what percent of concentration of the solution by volume? Average mass 180.157 Da; Monoisotopic mass 180. Thanks!? What is the concentration in % mass (m/v) of a solution if you dissolve 1.25 g NaCl in 25.00 mL DI H2O? Determine the mass of oxygen in a 7.20 g sample of Al2(SO4)3. She loves writing about home decor, organization, relationships, and pop culture. What is the percent of change if 24 is increased to 90? Vinegar may be produced from a variety of materials: apples or grapes (wine or cider vinegar); malted barley or oats (malt vinegar); and industrial alcohol (distilled white vinegar). If the density of the solution is 1.5 g / mL, What is its concentration? 755 mL Molarity of sodium hydroxide 0. How many aluminum atoms are in 3.78 g of aluminum? It starts at over 50% acid as a concentrate, and a little over 3% when diluted. If 250.0 mL of a 0.96 M solution of acetic acid (#C_2H_4O_2#) are diluted to 800.0 mL, what will be the approximate molarity of the final solution? Vinegar nor ACV is a cure-all. When acetic acid or ethanoic acid is not diluted then it is known as glacial acetic acid. What is judge James Edwards' party affiliation? First, convert the moles of \(\ce{HC2H3O2}\) in the vinegar sample (previously calculated) to a mass of \(\ce{HC2H3O2}\), via its molar mass. Household vinegar can have anywhere from 4%-8%. You have 1 L of 100 proof (50% V/V) Scotch whisky (ethanol, #C_2H_5OH#). Let medication do the job. What is the weight/weight % or percent by mass of the solute? Write a letter to your friend telling him her how spent your mid term holidays? Without doing any detailed calculations, determine which sample contains the most fluorine atoms. What is the mass/volume % of the solute? Given: HC2H3O2 Find: Mass % of O. The U.S. Food and Drug Administration (FDA) But this brush-on formula saves time and effort. What logo is a black R with a star on a gold background? A home treatment you can try is soaking your feet in a strong mixture of white vinegar and water for an hour. of a 80% sugar solution was mixed with 1 qt. Acetic acid is a main component of vinegar and also gives vinegar its characteristic smell. Food labelling can provide consumers with the information they need and desire to make food choices. For a constant supply of vinegar, pour 1 quart (4 cups) of wine and 1 cup of the mother vinegar into a wide-mouthed glass jug with at least 1-gallon capacity. How many carbon atoms are in a diamond (pure carbon) with a mass of 38 mg? A 5.54 gram sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. Suppose that 25.0 mL of a gas at 725 mm Hg and 20C is converted to standard pressure and temperature. You would add enough water to 175 mL of rubbing alcohol to make a total of 250 mL of solution. One mole of hydrochloric acid reacts with one mole of NaOH. Regular household vinegar is 5% acetic acid (2.5% when diluted) and the BC cleaner contains 3 different acids, one of which is phosphoric (the same found in pepsi). US EAS 38:2014, Labelling of pre-packaged foods - General requirements . Many types of vinegar are available, depending on #c_(volume)% = V_(solute)/(V_(solute) + V_(solvent)) * 100%#. ; Korolenko, L.I. Regular household vinegar is 5% acetic acid (2.5% when diluted) and the BC cleaner contains 3 different acids, one of which is phosphoric (the same found in pepsi). First, yeast feed on the sugar or starch of any liquid from a plant food such as fruits, whole grains, potatoes, or rice. A 1 tablespoon serving of typical, off-the-shelf apple cider vinegar, diluted with water to 5 percent acidity, contains no calories, proteins, fats, carbs, sodium or nutrients, per the USDA. 60 mL of ethanol is diluted with water to a final volume of 400 mL. a) If two samples of different elements contain the same number of atoms, the contain the same number of moles. Thank you! How much of each solution must he use? Even though it contains a few acids, they must rinse off more readily than vinegar. ), 50(10), 1995, 937-944. ass: Standard polar; Column diameter: 0.25 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 60 C; End T: 180 C; Start time: 4 min; CAS no: 108247; Active phase: Carbowax 20M; Carrier gas: He; Data type: Normal alkane RI; Authors: Kawakami, M.; Kobayashi, A.; Kator, K., Volatile constituents of Rooibos tea (Aspalathus linearis) as affected by extraction process, J. Agric. Please I need you kind help. Copper (II) fluoride contains 37.42% F by mass. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. 53.29%. Read more. How can I calculate percent concentration from molarity? For titration 0.04356 L0.1023 M=4.45610-3 mole of base was used, so there was 4.456 mmole of hydrochloric acid in every 25.00 mL of solution taken from the volumetric flask. We review their content and use your feedback to keep the quality high. If you double the temperature for a reaction, you cut the activation energy in half. What is the weight /volume % of the solute? How do you write conversion factors that correspond to the following concentration: 0.15% (v/v) acetic acid? Like other acids, acetic acid can be toxic. Acids carry away the minerals in your teeth, weakening enamel and potentially leading to cavities and other problems. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The typical method is titration using a strong base like sodium hydroxide (NaOH) to determine the percent acid in vinegar. How can the concentration of water in solution be decreased? Determine the number of moles of O in 1.7 moles of CaCO3. Since HCl is a heavy acid, it It may be easy to tell the difference between sweet, tangy apple cider versus apple cider vinegar (ACV). What is the mass percent of 400 mLof a solution that contains 60.0 g of calcium chloride? The numerical value of the mole is defined as being equal to the number of atoms in exactly 12 g of pure carbon-12. Average mass 180.157 Da; Monoisotopic mass 180. Calculate the amount of sodium fluoride (45.24 %F) that a woman should consume to get the recommended amount of fluorine. 47 g Mass of beaker + KHP97. 2. 10 #cm^3# of #H_2O_2# solution when reacted with #KI# solution produced 0.5 #g# of iodine. The abnormal warty tissue turns white and can be better distinguished from normal tissue. ACV is a perennial "health food" favorite, but comparing cider vinegar to apple cider vinegar gets a little murkier. What is the mass percent of sodium in #NaCl#? How do you calculate the grams solute required to make the following solution: 2.5 L of 0.90% of NaCl (m/v)? Calculate the mass percent composition of sodium in sodium oxide. [aspirin] [Note: Develops the vinegar-like odor of acetic acid on contact with moisture.] 52 g Volume of NaOH to neutralize the KHP solution7. It has a pleasant aroma and mint flavor. Volumetric flask is 10 times larger than the samples titrated, so it contained 44.56 mmole of acid. You have 1500.0 g of a bleach solution. Once the juice has reduced by a third or a half, pour it into a wooden barrel and store the barrel somewhere safe for 12 years, which is the minimum amount of time needed for the juice to turn into acetic acid. ACV is a perennial "health food" favorite, but comparing cider vinegar to apple cider vinegar gets a little murkier. One mole of hydrochloric acid reacts with one mole of NaOH. As a result, the molecules collide more frequently with the walls of the container thus causing an increase in pressure. Convert 3.5 mol of Helium (He) to a number of Helium (He) atoms. What is the percent by mass of #"12 M HCl"#? Why? Calculate the mass percent composition of oxygen in acetic acid. If you need to make a 5.6% solution of #NaCl# using 9.6g of #NaCl#, how many grams of water is needed? Usually, the acetic acid is produced by a double fermentation, converting simple sugars to ethanol using yeast, and ethanol to acetic acid by acetic acid bacteria. A home treatment you can try is soaking your feet in a strong mixture of white vinegar and water for an hour. How many individual hydroxide ions (OH-) are found in 22.75 mL? So the 5% vinegar you buy in the store has 5 g of acetic acid per 100 mL (or 50g per L). vinegar. vinegar, sour liquid that is made by the fermentation of any of numerous dilute alcoholic liquids into a liquid containing acetic acid. How many grams of KI are in 25.0 mL of a 3.0% (m/v) KI solution? Given: HC2H3O2 Find: Mass % of O. How much water needs to be added to this volume to prepare a solution containing 4.9 g/L of sulfuric acid? Report Sheet What are some examples of percent concentration? It found that consuming 1 to 2 tablespoons of vinegar each day leads to modest weight loss and lower triglyceride levels after a few months, but the study only covered 175 participants with obesity. The dosage the nurse gives the patient is #"425 mg"#. In a #100%# #"m/m"# solution, how many grams of solute are present in a #100*g# mass of solution? However, some brands add ingredients, such as sweetening syrup, starch and flavoring, or use concentrated apple juice to add depth to their product. Transl. If we have #5.5%# #"m/m"# solution with respect to a solution.what is the mass of solute in a #2000*g# mass of solution? How will you collect data for this experiment? What is t he story all about the crown jewels of heezenhurst by Sylvia mendez ventura? There's a good chance you've heard of taking ACV with water or using it as part of a detox diet, but what is it, anyway? What is the concentration of a 1.2 % m/m solution of albumin in milligrams per millilitre? Performing the Titration of Vinegar One mole of acetic acid has a mass of 60,05 grams. Mass Percent = Mass of C in a sample of a compound/ Mass of the sample of the compound X 100%. These variables, of course, change the nutritional makeup of the product. Empirical formula molar mass is the sum of the molar masses of all of the atoms in an empirical formula. Sulfuric acid has a molar mass of 98 g/mol. What is the mass percent of chromium? What is the mole fraction of #"Na"_2"SO"_4# in a solution which is #11.5%# by weight #"Na"_2"SO"_4# ? His system works by feeding wastewater into a bioreactor. Amixture was found to contain 1.50 g #NH_4Cl#, 0.80 g #NaCl#, and 1.20 g #SiO_2#. The rotten smell of decaying animal carcass is partially due to a nitrogen-containing compound called putrescence. The typical method is titration using a strong base like sodium hydroxide (NaOH) to determine the percent acid in vinegar. Vinegar is an aqueous solution of acetic acid and trace compounds that may include flavorings.Vinegar typically contains 58% acetic acid by volume. US EAS 38:2014, Labelling of pre-packaged foods - General requirements . such as acetic acid found in vinegar. Hydrogen chloride (HCl) ionises fully in water into hydrogen ions and ions of chloride. Mass percent of element X = Mass of Element X in 1 mol of compound/Mass of 1 mol of compound X 100%. Examples may include raspberry cider vinegar or strawberry cider vinegar, but vinegar products that have the word "cider" on their label without containing apple cider aren't too common. Calculate the mass percent composition of O in acetic acid. I have 2oz concentrated 40% aqueous solution, I want to dilute it 10% , How I dilute it ??? Chan School of Public Health, Journal of Evidence-Based Integrative Medicine, Bioscience, Biotechnology, and Biochemistry, Harvard T.H. The concentration of urea in a solution prepared by dissolving 16 g of urea in 39 g of is __________% by mass. How much water must be added to 6 fluid ounces of this lotion to reduce it to one which is 75% nonalcoholic? What is the concentration of this solution expressed as mass/volume percent? How much alcohol is in a 9-oz solution of water and alcohol that is 20% alcohol? What would be the new volume. Thank you. Acidity measurements are more technical and careful. The value of a mole (mol) is 6.022 X 10^23. Find its molecular formula. Chan School of Public Health. How many moles of silver are in the ring? 52 g Volume of NaOH to neutralize the KHP solution7. Read more. Every year, transfer the vinegar into a smaller barrel since it will lose 10 percent of its volume each year. Incompatible with strong oxidizing agents, water,strong bases, alcohols. How many kilograms of water must be evaporated from 40 kg of a 10% salt solution to produce a 25% solution?

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