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| Q. |
Which of the following represent the concentration of a solution? |
| A. | Only free ions |
| B. | Only bound ions |
| C. | Free ions and bound ions |
| D. | Either free ions or bound ions |
| Answer» C. Free ions and bound ions | |
| Explanation: Concentration refers to the sum of free ions and bound ions. Activity refers only to free ions. | |
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