Question

1. How many grams of H3PO4 is needed to prepare 550mL of a 0.31N solution? (assume all H+ enter reaction)

A. 5.6

B. 1.9

C. 1.7

2. Calculate the volume in, mililiters, of a 1.50M NaHCO3 solution that provides 28.0g NaHCO3

A. 500

B. 222

C. 0.222

3. In between 40oC and 50oC, a decrease in temperature will increase the solubility of Na2SO4

True

False

4. Calculate the N of 20g H3PO4 in 500ml of solution (assume all H+ enter solution)

A. 1.2

B. 4.1

C. 2.8

5. Calculate the M of a 4.1m KCl solution if it's density is 1.10g/ml

A. 3.0

B. 29

C. 3.5

6. The mass percent, %(m/m), for 55.0g KOH in 178.0g H2O is:

A. 55

B. 24

C. 178

D. 31