Chemistry

Solutions Problem Set Chem B11

Name____________________________________ Lab Period________________________________

Saturated vs Unsaturated:

1. The solubility of CaCl2 in water is 74.5 g/100 mL. Is a solution that contains 255 g CaCl2 in 350 mL saturated or unsaturated? Is there any solid CaCl2 on the bottom of the container?

2. The solubility of NiI2 is 148 g/100 mL. Is a solution that contains 115 g of NiI2 in 75 mL of water sataurated or unsaturated? Is there any solid NiI2 on the bottom of the container?

Equivalents

3. How many equivalents of Mg2+ are in 25.0 g of MgCl2?

Solubility Rules: Determine if the following ionic compounds are soluble or insoluble in water based on the solubility rules chart found in your textbook.

Compound	Soluble? (Y/N)	Compound	Soluble? (Y/N)	Compound	Soluble? (Y/N)
Na2S		Ag2SO4		CuCl2
Hg2Cl2		K2SO4		Fe(OH)2
Ba(C2H3O2)2		Ga2(WO4)3		(NH4)2CO3
Fe2S3		SrBr2		Y(NO3)3

Precipitate Formation:

4. Will a solid precipitate form when K2CO3 is mixed with Ba(NO3)2? Write out the reaction equation including all the phases. If there is a precipitate, circle it.

5. Will a solid precipitate form when AgNO3 is mixed with RbBr? Write out the reaction equation including all the phases. If there is a precipitate, circle it.

Osmosis: isotonic solutions contain either 0.9% NaCl or 5% dextrose.

6. What will happen to blood cells in a 0.5% NaCl solution?

7. What will happen to blood cells in a 3% dextrose solution?

8. What will happen to blood cells in a 10% dextrose solution?

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Bakersfield College Wade Ellis

9. Calc %(m/m) NaCl

87.2 g NaCl in 1695 g salt water

10. Calc %(v/v) wine

21.2 cups wine in 44.2 cups wine cooler

11. Calc %(m/m)

0.325 g NaF in 130. g toothpaste

12. Calc g glucose needed to make

455 mL of a 5.00 % (m/v) glucose soln.

13. Calc mL of radiator solution when 197 mL antifreeze is used to make a 25% (v/v) solution

14. Calc M CaBr2 when 44 g CaBr2 produces 500. mL of solution.

15. Calc mL NaCl when 26 g NaCl is used to make a 0.10 M solution.

16. Calc M HCl when 56.38 g HCl is used to make a 1527 mL solution.

17. Dopamine is a potent drug administered intravenously to increase blood pressure. How many mL of a 4.0% (m/v) solution is needed to prepare 250 mL of a 0.088% (m/v) solution?

18. Calc the resulting M when 125 mL of 12.0 M HCl is diluted to 850 mL.