/
Name
/
Date
Per
Solutions
Mass Percent
1. Calculate the mass percent of sodium acetate in 5.00
of water.
g
of sodium acetate in 2.5.0
g
2. Calculate the mass in grams, of NaC1 present in 11.5 g of 6.25% NaC1 solution.
7
3. a laboratory assistant prepared a potassium chloride solution for her class by
dissolving 5.34 g of KCI in 152 g ofwater. What is the mass percent of the
solution she prepared?
4.
I-low many grams of CuCl
2 are required to prepare 1250. g of a 1.25% (by mass)
CuCI2 solution?
1
Molai’ity
5. What is the molaritv of a solution that has a total volume of 0.500 L and contains
0.426 mol of NaOH?
6. What is the molariy of a solution that has a total volume of I 15 ml. and 1.25 g. of
KNO’?
7. It is desired to prepare exactly 100. mL of sodium chloride solution, 1f2.71 g of
NaCI is weighted out, transferred to a volumetric flask, and water added to the
I 00-mL mark. what is the molarity of the resulting solution?
8. If 495 g of NaOH is dissolved to a final total volume of 20.0 L, what is the
molarity of the so! ution?
•ø9
3 solution?
3 is required to prepare 150. mL of 0.250 M KNO
9. What mass of KNO
10. What volume of 1.0 M NaC1 solution can be prepared from 1 0 lb of NaC1?
3
11. Calculate the number of moles of each ion present in 10.2 ml. of 0.451 M AICI
solution.
12. Strong acid solutions may have their concentration determined by reaction with
measured quantities of standard sodium carbonate solution. What mass of
NaCO is needed to prepare 250. mL of 0.500 M 3
CO
2
Na
?