Exercise 12.34 Describe how to prepare each solution from the dry solute and the

Question

Exercise 12.34 Describe how to prepare each solution from the dry solute and the solvent. Part A How much dry solute would you take to prepare 134 mL of 0.105 M NaNO3? Express your answer using three significant figures. msolute = gNaNO3 SubmitMy AnswersGive Up Part B How much dry solute would you take to prepare128 g of 0.100 m NaNO3? Express your answer using three significant figures. msolute = gNaNO3 SubmitMy AnswersGive Up Part C How much dry solute would you take to prepare 128 g of 1.1 % NaNO3 solution by mass? Express your answer using two significant figures. msolute = gNaNO3 SubmitMy AnswersGive Up Part D How much solvent would you take to prepare the solution in part B? Express your answer using three significant figures. msolvent = gH2O SubmitMy AnswersGive Up Part E How much solvent would you take to prepare the solution in part C? Express your answer using three significant figures. msolvent = gH2O

Explanation / Answer

Part A : To prepare 134 ml of 0.105 M NaNO3

grams of solute = 0.105 M x 84.995 x 0.134 = 1.196 g

Part B : To prepare 128 g of 0.100 m NaNO3

mass of solute = 0.1 x 84.995 x 0.128 = 1.088 g

Part C : 1.1 % of 128 g = 0.011 x 128 = 1.408 g

mass of solute = 1.408 g

Part D : solvent in Part B = 128 - 1.088 = 126.912 g = 126.912 ml

Part E : Solvent in Part C

mass of solvent = 128 - 1.408 = 126.592 g

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