Chapter 4 Practice - Weebly
1. Classify the following as strong, weak, or nonelectrolyte:
a. CH3CH2OH d. C6H12 g. HNO3
b. HCl e. MgCl2
c. NH3 f. Be(OH)2
2. Calculate the molarity of the following solutions:
a. 49.73 g H2SO4 in enough water to make 500 mL of solution
b. 27.74 g C12H22O11 in enough water to make 750 mL of solution
c. 5.761 g of KOH in enough water to make 350 mL of solution
d. 21.18 g of Fe(NO3)3 in enough water to make 1.000 L of solution
3. Calculate the concentration of each of the ions in the following solutions:
a. 0.25 M Na3PO4 c. 0.14 M Co(NO3)2
b. 0.87 M Na2CO3 d. 0.23 M (NH4)2Cr2O7
4. Describe how you would prepare the following solutions:
a. 1.50 L of 0.500 M K2Cr2O7 c. 250 mL of 0.20 M AgNO3
b. 750. mL of 0.350 M Ba(NO3)2
5. Describe how you would prepare the following solutions:
a. 500 mL of 1.0 M H2SO4 from 17.8 M H2SO4
b. 1 L of 0.5 M AgNO3 from solid AgNO3
c. 500 mL of 1.5 M NaCl from 7.3 M NaCl
d. 800 mL of 0.2 M NiCl2 from 4.6 M NiCl2
6. A standard solution of KHP (C8H5O4K) was made by dissolving 3.697 g of KHP in enough water to make 100.0 mL of solution. Calculate the KHP concentration.
7. A solution of ammonium acetate (NH4C2H3O2) was made by dissolving 3.85 g of ammonium acetate in enough water to make 500 mL of solution. Calculate the solution concentration.
8. How many moles of ammonium acetate are contained in 17 mL of the solution in problem 7?
9. How many milliliters of 0.136 M NaOH are required to react with the H2SO4 in 10 mL of a 0.202 M solution? The reaction is:
2NaOH + H2SO4 ( Na2SO4 + 2H2O
10. How many milliliters of 0.50 M Ca(OH)2 are required to react with the HCl in 30 mL of a 0.12 M solution? The reaction is:
2HCl + Ca(OH)2 ( CaCl2 + 2H2O
11. What is the concentration of the following in ppm (mg/L ( MEMORIZE!)?
a. 6.2 X 10-3 g Be+2 in 750 mL of solution
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