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: When dilute sulfuric acid is added to copper carbonate, a chemical reaction occurs that produces carbon dioxide gas. This gas is released as bubbles, causing effervescence or fizzing in the test tube.
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Color Change: The solid copper carbonate is green in color. When it reacts with the sulfuric acid, it forms copper sulfate which is blue in color. So, you will observe a color change from green to blue.
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Formation of a Salt: The reaction between copper carbonate and sulfuric acid produces a salt, copper sulfate. After the effervescence has stopped, you will observe the formation of this blue crystalline solid in the test tube.
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