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14 March, 03:29

List four observations that indicate that a chemical reaction may be taking place

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  1. 14 March, 07:13
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    For a given reaction to take place, there might be at least one of these (7) signs;

    - formation of gas bubbles, formation of a precipitate (creation of a solid from a solution), a change in color, a change in volume (due to change in density), a change in temperature (endothermic or exothermic), change in taste or smell and emission of light or fire ...
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