Question

Solutions Concentration Handout %w/v and %v/v Calculations 1. What is the mass of milk fat in 1.0 L of whole milk? (Whole milk is -4% w/v milk fat), 2. What is the mass of milk fat in 1.0 L of 1% milk? 3. What is the volume of alcohol in 200. mL of an alcoholic beverage that is 5.00% v/v alcohol? 4. What is the %w/v of a solution containing 12.0 g of NaCl in 175 mL of solution? So 39.10 mol solute Molarity Calculations Lor Soltau What is the molarity of a solution containing 0.50 moles of KCl in 1.5 L of solution? What is the molarity of a solution ce .5molkal 35.45 74.55 19852448m 2. What is the molarity of a solution containing 37 g of KCl in 2.5 L of solution? 37 g Ku Imol kol = 49143 112 mol 174.559 IL 2.5L 3. How many moles of NaCl are contained in 500 mL of a 0.20 M solution? . 2M 4963112 mol

Answer 1

£ 8 - 2 - 3. % w/v = Mass of solute ling) x 100% Volume of soln (in ml) 4 %= Mass of milk fat x 100% 1000 ml Mass of milk fat = 40g 1% = Mass of milk fat ling) X 100) - 1000mL 7 Mass of milk fat= log % v/v = volume of solute (mL) x 100% Volume of solution (ml) 5.00% = Volume of alcohol x 100% 200 ml Volume of Alcohol = 10.0 mL % w/V= Mass of Nall x 10o.l. Volume of soln 12.0g x 100.l. = 6.86% 175 ml % - 4.