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1 | |
Which of the following descriptions best describes the ionic compounds formed from the acetate ion, CH3COO–. |
| | A) | All acetate compounds dissolve well. |
| | B) | All acetate compounds, except silver acetate and mercury(I) acetate, dissolve well. |
| | C) | The only acetate compounds that dissolve well are silver acetate and mercury(I) acetate. |
| | D) | No acetate compounds dissolve well. |
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2 | |
John predicts that the compound calcium sulfate, CaSO4, will be produced when two solutions are mixed. What would John expect to observe when he mixes the two solutions? |
| | A) | The mixed solution turns cloudy, because CaSO4 has low solubility. |
| | B) | The mixed solution turns cloudy, because CaSO4 has high solubility. |
| | C) | The mixed solutions stay clear, because CaSO4 has low solubility. |
| | D) | The mixed solutions stay clear, because CaSO4 has high solubility. |
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3 | |
When combining two solutions, Jill observes carefully for temperature change, light being produced, and sound being produced. Which of these observations indicate an energy change and thus a possible chemical reaction? |
| | A) | All three observations involve energy changes. |
| | B) | All observations except temperature change involve energy changes. |
| | C) | All observations except light being produced involve energy changes. |
| | D) | None of these observations indicate energy changes. |
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4 | |
Which of the following physical changes does NOT provide evidence that a chemical reaction has occurred? |
| | A) | A solid forms when two solutions are mixed. |
| | B) | Bubbles of gas form when two liquids are mixed. |
| | C) | A different odour is detected after a solid chemical is heated. |
| | D) | A chemical changes state when heated. |
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