1. How many grams of H3PO4 is needed to prepare 550mL of a 0.31N solution? (assu

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

Explanation / Answer

1)a 2)b3)true 4)a 5)c 6)d

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