The Water and Solutions Test consists of 20 questions. Correct answers will be provided after your answers have been submitted. If they are available, possible solutions can be accessed by clicking an additional link at the bottom of the answer, which will open a problem solution screen. If you bring up such a solution screen be sure to close it by clicking the button in the upper left corner or upper right corner.
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1 | |
Which of the following is a solution? |
| | A) | A cup of tea with a teaspoon of dissolved sugar. |
| | B) | The brass in a candle stick. |
| | C) | Air in the atmosphere. |
| | D) | All of the above. |
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2 | |
The part of a solution that is present in the larger amount is the |
| | A) | solute. |
| | B) | solvent. |
| | C) | clear part. |
| | D) | colorant. |
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3 | |
The solvent plus the __ ? __ make up a solution. |
| | A) | pigment |
| | B) | stain |
| | C) | solute |
| | D) | colorant |
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4 | |
A solution with a relatively large amount of solute is said to be |
| | A) | dilute. |
| | B) | a weak solution. |
| | C) | concentrated. |
| | D) | an amalgam. |
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5 | |
A concentration of 1 ppb expressed as money means 1 cent in every |
| | A) | $1,000 |
| | B) | $10,000,000 |
| | C) | $100,000,000 |
| | D) | $1,000,000,000 |
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6 | |
To convert a solution concentration expressed in ppm to the equivalent percent concentration you simply divide by |
| | A) | 1,000 |
| | B) | 10,000 |
| | C) | 100,000 |
| | D) | 1,000,000 |
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7 | |
Rubbing alcohol that is a 12% by volume concentration has 12 mL of pure isopropyl alcohol mixed with |
| | A) | 88 mL of water. |
| | B) | 100 mL of water. |
| | C) | 88 mL of solution. |
| | D) | 100 mL of solution. |
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8 | |
Hydrogen peroxide that is 3% by weight concentration has 3 grams of pure hydrogen peroxide mixed with |
| | A) | 97 grams of solution. |
| | B) | 100 grams of solution. |
| | C) | 97 grams of water. |
| | D) | 100 grams of water. |
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9 | |
Seawater with a salinity of 5‰ has 5 g of salt dissolved in |
| | A) | 995 g of pure water. |
| | B) | 1,000 g of pure water. |
| | C) | 95 g of seawater. |
| | D) | 100 g of seawater. |
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10 | |
A solution is saturated when |
| | A) | there is not enough solvent. |
| | B) | no more solute can be dissolved. |
| | C) | the solute is dissolving at the same rate it is coming out of solution. |
| | D) | none of the above. |
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11 | |
Water has an unusually high latent heat and some unusual density changes occur with temperature changes because |
| | A) | water has a density of 1 kg/L |
| | B) | of hydrogen bonding. |
| | C) | water has a greater density than ice. |
| | D) | a molecule has 2 hydrogen atoms but only 1 oxygen. |
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12 | |
As water cools from 4o to 0oC its density |
| | A) | increases. |
| | B) | decreases. |
| | C) | does not change. |
| | D) | might or might not change, depending on other variables. |
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13 | |
Which of the following are properties of basic solutions? They |
| | A) | turn blue litmus paper red. |
| | B) | taste sour. |
| | C) | feel slippery. |
| | D) | They react with active metals producing hydrogen gas. |
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14 | |
Which of the following are properties of acidic solutions? They |
| | A) | turn blue litmus paper red. |
| | B) | taste sour. |
| | C) | react with active metals, releasing hydrogen gas. |
| | D) | all of these are true. |
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15 | |
A bottle of whiskey contains 40% alcohol by volume. This means that the whiskey contains 40 mL of alcohol |
| | A) | in every 100 mL of whiskey. |
| | B) | mixed with 100 mL of water. |
| | C) | mixed with 60 mL of whiskey. |
| | D) | in every 140 mL of whiskey. |
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16 | |
The water hardness in an area is reported as 700 ppm total dissolved solids. This is the same concentration as |
| | A) | 0.007% |
| | B) | 0.07% |
| | C) | 0.7% |
| | D) | 7% |
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17 | |
According to the modern definition, NH3 is |
| | A) | an acid because it contains hydrogen. |
| | B) | a base because it can accept H+ ions from water. |
| | C) | an acid because it raises the H+ ion concentration. |
| | D) | a base because it lowers the pH. |
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18 | |
If the force of attraction between the ions in a solid is very strong, you would expect the solid to have |
| | A) | low solubility in water. |
| | B) | high solubility in water. |
| | C) | low solubility in a non-polar solvent. |
| | D) | high solubility in a non-polar solvent. |
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19 | |
A solution with a pH of 5 |
| | A) | is twice as acidic as one with a pH of 4. |
| | B) | is half as acidic as a solution with a pH of 4. |
| | C) | is ten times as acidic as a solution with a pH of 4. |
| | D) | is one tenth as acidic as a solution with a pH of 4. |
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20 | |
Which of the following solutions is likely to have a pH greater than 7? |
| | A) | sodium chloride |
| | B) | ammonia |
| | C) | carbonic acid |
| | D) | pure water |
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