when a student adds excess dilute sulfuric acid to a sample of solid copper carbonate in a test-tube, the three observations made will be
Question
When a student adds excess dilute sulfuric acid to a sample of solid copper carbonate in a test-tube, the three observations made will be
Solution
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Effervescence: The first observation would be effervescence or bubbling in the test tube. This is due to the formation of carbon dioxide gas as a result of the reaction between copper carbonate and sulfuric acid.
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Color Change: The second observation would be a change in color. Copper carbonate is green in color, but when it reacts with sulfuric acid, it forms copper sulfate which is blue in color. So, the solution in the test tube would change from green to blue.
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Temperature Change: The third observation could be a change in temperature. This reaction is exothermic, meaning it releases heat. Therefore, the test tube would feel warm to the touch.
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