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| 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? |
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20% |
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17% |
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16.7% |
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None of the previous answers. |
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| 2 |
How much sodium hydroxide is needed to make 225 g of a 15% NaOH solution? |
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191 g |
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1.5x103 g |
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34 g |
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None of the previous answers. |
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| 3 |
What is the molarity of a solution prepared by dilution of 0.125 moles of sodium chloride to 2.50x102 mL with water? |
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0.500 M |
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5.00x10-4 M |
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2.00 M |
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29.4 M |
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None of the previous answers. |
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| 4 |
7.5 g of acetic acid are diluted to 150 mL with water. What is the molarity of the acetic acid? |
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50 M |
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8.3x10-4 M |
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0.33 M |
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0.83 M |
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None of the previous answers. |
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| 5 |
How many grams of sodium hydroxide are needed to prepare 250 mL of a 0.20 M sodium hydroxide solution? |
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0.050 g |
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2.0x103 g |
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2.0 g |
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1.2x10-3 g |
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None of the previous answers. |
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| 6 |
What is the approximate concentration of water in pure room temperature water? |
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55.4 M |
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18 M |
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1.0 M |
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None of the previous answers. |
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| 7 |
Most laboratory solutions have concentrations between 10-3 M and 18 M. Why is the molarity of water so high (see previous question)? |
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Water has an extraordinarily high density. |
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Water has a very low molecular mass. |
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Water is purer than other liquids. |
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None of the previous answers. |
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| 8 |
25 mL of 3.0 M sulfuric acid is diluted to 750 mL with water. What is the molarity of the resulting solution? |
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90 M |
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0.011 M |
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10 M |
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0.10 M |
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None of the previous answers. |
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| 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? |
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0.050 mL |
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5.0x101 mL |
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4.5x104 mL |
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2.2x10-5 mL |
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None of the previous answers. |
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| 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? |
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0.35 M |
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10.5 M |
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0.095 M |
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None of the previous answers. |
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| 11 |
How many grams of sodium nitrate are needed to prepare 250 mL of a 0.10 M solution? |
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2.1 g |
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2.1x103 g |
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2.9x10-4 g |
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34 g |
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None of the previous answers. |
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| 12 |
How many mL of a 0.400 M sodium hydroxide solution should be diluted to
3.50x102 mL with water to prepare a 5.00x10-3 M sodium hydroxide solution? |
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2.8x104 mL |
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3.57x10-5 mL |
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4.38 mL |
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0.229 mL |
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None of the previous answers. |
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| 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? |
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sodium chloride |
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hydrogen chloride |
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ethanol (C2H5OH) |
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oxygen |
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glucose |
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| 14 |
1.00x102 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? |
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2.9x10-4 mol/L |
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9.3x10-3 mol/L |
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2.9x10-5 mol/L |
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2.9x10-6 mol/L |
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None of the previous answers. |
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| 15 |
What are the concentrations of calcium and chloride ions respectively in a 0.10 M calcium chloride solution? |
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0.10 M, 0.10 M |
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0.10 M, 0.20 M |
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0.20 M, 0.10 M |
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Both are 0.00 M |
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| 16 |
What are the concentrations of iron and sulfate ions respectively in a 0.25 M iron(III) sulfate solution? |
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0.25 M, 0.25 M |
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0.10 M, 0.20 M |
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0.25 M, 0.75 M |
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0.50 M, 0.75 M |
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None of the previous answers. |
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| 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? |
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4.3x10-2 M, 2.2x10-2 M |
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2.2x10-2 M, 2.2x10-2 M |
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2.2x10-2 M, 4.3x10-2 M |
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None of the previous answers. |
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| 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? |
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0.0644 M |
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0.191 M |
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5.23 M |
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15.5 M |
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None of the previous answers. |
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| 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? |
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0.161 M |
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0.322 M |
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0.0805 M |
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0.0383 M |
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None of the previous answers. |
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| 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? |
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0.302 M |
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0.604 M |
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0.0293 M |
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0.151 M |
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None of the previous answers. |
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