
1 
What is the mass percent of sodium chloride in a solution prepared by adding 15 g of sodium chloride to 75 g of water? 



20% 



17% 



16.7% 



None of the previous answers. 





2 
How much sodium hydroxide is needed to make 225 g of a 15% NaOH solution? 



191 g 



1.5x10^{3} g 



34 g 



None of the previous answers. 





3 
What is the molarity of a solution prepared by dilution of 0.125 moles of sodium chloride to 2.50x10^{2} mL with water? 



0.500 M 



5.00x10^{4} M 



2.00 M 



29.4 M 



None of the previous answers. 

4 
7.5 g of acetic acid are diluted to 150 mL with water. What is the molarity of the acetic acid? 



50 M 



8.3x10^{4} M 



0.33 M 



0.83 M 



None of the previous answers. 

5 
How many grams of sodium hydroxide are needed to prepare 250 mL of a 0.20 M sodium hydroxide solution? 



0.050 g 



2.0x10^{3} g 



2.0 g 



1.2x10^{3} g 



None of the previous answers. 

6 
What is the approximate concentration of water in pure room temperature water? 



55.4 M 



18 M 



1.0 M 



None of the previous answers. 





7 
Most laboratory solutions have concentrations between 10^{3} M and 18 M. Why is the molarity of water so high (see previous question)? 



Water has an extraordinarily high density. 



Water has a very low molecular mass. 



Water is purer than other liquids. 



None of the previous answers. 





8 
25 mL of 3.0 M sulfuric acid is diluted to 750 mL with water. What is the molarity of the resulting solution? 



90 M 



0.011 M 



10 M 



0.10 M 



None of the previous answers. 

9 
How many mL of a 6.0 M HCl solution should be diluted to 1.5 L with water to prepare a 0.20 M HCl solution? 



0.050 mL 



5.0x10^{1} mL 



4.5x10^{4} mL 



2.2x10^{5} mL 



None of the previous answers. 

10 
5.0 mL of 0.35 M silver nitrate are diluted to 150 mL with water. What is the molarity of the resulting silver nitrate solution? 



0.35 M 



10.5 M 



0.095 M 



None of the previous answers. 





11 
How many grams of sodium nitrate are needed to prepare 250 mL of a 0.10 M solution? 



2.1 g 



2.1x10^{3} g 



2.9x10^{4} g 



34 g 



None of the previous answers. 

12 
How many mL of a 0.400 M sodium hydroxide solution should be diluted to
3.50x10^{2} mL with water to prepare a 5.00x10^{3} M sodium hydroxide solution? 



2.8x10^{4} mL 



3.57x10^{5} mL 



4.38 mL 



0.229 mL 



None of the previous answers. 

13 
While solubility is difficult to predict, the rule "like dissolves like" is often a good predictor of solubility. By arbitrary convention, the line for solubility is usually drawn at a 1% solution. Which one of the following would you predict would not be classed as soluble in water? 



sodium chloride 



hydrogen chloride 



ethanol (C_{2}H_{5}OH) 



oxygen 



glucose 

14 
1.00x10^{2} mL of water in equilibrium with air at 1 atm total pressure contains 9.3x10^{4} g of oxygen. What is the molarity of oxygen in a saturated aqueous solution? 



2.9x10^{4} mol/L 



9.3x10^{3} mol/L 



2.9x10^{5} mol/L 



2.9x10^{6} mol/L 



None of the previous answers. 

15 
What are the concentrations of calcium and chloride ions respectively in a 0.10 M calcium chloride solution? 



0.10 M, 0.10 M 



0.10 M, 0.20 M 



0.20 M, 0.10 M 



Both are 0.00 M 





16 
What are the concentrations of iron and sulfate ions respectively in a 0.25 M iron(III) sulfate solution? 



0.25 M, 0.25 M 



0.10 M, 0.20 M 



0.25 M, 0.75 M 



0.50 M, 0.75 M 



None of the previous answers. 

17 
100 ml of an aqueus saturated solution of calcium hydroxide contains 0.16 grams of calcium hydroxide at room temperature. What are the concentrations of calcium and hydroxide ions respectively in a saturated calcium hydroxide solution? 



4.3x10^{2} M, 2.2x10^{2} M 



2.2x10^{2} M, 2.2x10^{2} M 



2.2x10^{2} M, 4.3x10^{2} M 



None of the previous answers. 





18 
14.5 mL of 0.111 M sodium hydroxide are needed to titrate 25.0 mL of an HCl solution to the end point. What is the molarity of the hydrochloric acid solution? 



0.0644 M 



0.191 M 



5.23 M 



15.5 M 



None of the previous answers. 

19 
14.5 mL of 0.111 M sodium hydroxide are needed to titrate 10.0 mL of a sulfuric acid solution to the end point. What is the molarity of the sulfuric acid solution? 



0.161 M 



0.322 M 



0.0805 M 



0.0383 M 



None of the previous answers. 

20 
22.7 mL of 0.133 M silver nitrtate are needed to titrate 10.0 mL of a calcium chloride solution to the end point. What is the molarity of the calcium chloride solution? 



0.302 M 



0.604 M 



0.0293 M 



0.151 M 



None of the previous answers. 
