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2 December, 03:33

What evidence of a chemical reaction might you see when dropping an alka-seltzer tablet in a glass of water

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  1. 2 December, 06:07
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    A chemical reaction is characterised by evidence of a chemical change; such as a change in colour, production of a gas or a solid, or a change in temperature. evidence of a gas being produced is the bubbles that form then the tablet is dissolving, and theres is likely to be a slight change in temperature due to the energy produced, but this would not likely be obvious
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