homework5

# homework5 - many milliliters of concentrated acid does the...

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Homework #5 Name ______________________ Chem 30A Dr. Harrison 1. (3 pts) Calculate the following. a) Grams of KCl to make 1.22 L of a 0.250 M solution. b) Volume of water (in mL) to make a 0.400 M solution from 33.5 g of sodium sulfate. c) How many grams of lithium nitrate do you need to make 755 mL of a 0.255 M solution? 2. (4 pts) A 8.00 g hunk of sodium phosphate is dissolved in water to give a resulting solution of 541 mL. The density of the solution is 1.18 g/mL. a) Calculate the molarity of the solution. b) Calculate the mass/mass percent of the solution.

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3. (6 pts) An experiment requires a student to prepare 100. mL of a 3.00 M nitric acid solution from 8.7 L of a 15.8 M solution of concentrated nitric acid. How
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Unformatted text preview: many milliliters of concentrated acid does the student use? How many milliliters of water is added to the acid? 4. (4 pts) What volume of water would you use to prepare 250. g of 14.0% (m/m) solution of ammonium chloride? The density of water is 1.0 g/mL. 5. (3 pts) Two solutions, A and B, are separated by a semipermeable membrane. For each case, predict the direction of the net flow of water. a) A is 5% NaCl, B is pure water b) A is 0.100M sodium chloride, B is 0.100M potassium nitrate c) A is 0.050M sodium iodide, B is 0.500M potassium nitrate...
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