In a test tube, hydrochloric acid is poured over a few zinc granules. List two observations that suggest that a chemical reaction has occurred.
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Hydrogen gas will evolve.
formation of ZnCl
formation of ZnCl
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Two observations that suggest that a chemical reaction has OCCURRED :
( 1) FORMATION OF BUBBLE due to the explosion of hydrogen gas when an acid reacts with a metal ( property of acid).
(2). EMISSION OF HEAT or CHANGE IN TEMPERATURE because reaction of HCL to ZnCl is highly Exothermic.
( 1) FORMATION OF BUBBLE due to the explosion of hydrogen gas when an acid reacts with a metal ( property of acid).
(2). EMISSION OF HEAT or CHANGE IN TEMPERATURE because reaction of HCL to ZnCl is highly Exothermic.
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