1. What property of a solution remains the same after it is diluted?

a) amount of solvent

b) total volume

c) amount of solute

d) concentration

2. How many grams of iron metal do you expect to be produced when 325 grams of an 87.5 percent by mass iron (II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve this problem. 

2 Al _(s) + 3 Fe(NO₃)_{2 (aq)}  ______ 3 Fe _(s) + 2 Al(NO₃)_{3 (aq)}

3. How many grams of a stock solution that is 87.0 percent H2SO4 by mass would be needed to make 200 grams of a 35.5 percent by mass solution? Show all of the work needed to solve this problem.

4. Describe, in detail, how to make 2.0 liters of a 1.0 molar HCl solution from a 12.5 molar HCl stock solution.

_5.  How many moles of sodium chloride (NaCl) solute are in 315 grams of a 91.0 percent by mass solution?

a) 3.46 mol NaCl

b) 4.90 mol Nacl

c) 5.37 mol NaCl

d) 5.92 mol NaCl