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Kritip
@Kritip
April 2021
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In a test tube, hydrochloric acid is poured over a few zinc granules. List 2 observations that suggest that a chemical reaction has occurred.
Answers & Comments
cutekudi
If zinc is more reactive than hydrochloric acid then zinc chloride will be formed and colour of HCl change
32 votes
Thanks 44
Milans88
When we pour HCL into a test tube with Zn granules this reaction happens:
Zn + 2HCl ---》 ZnCl2 + H2 gas
1. We find bubbles of H2 coming out.
As a confirmation if we put a flame near the test tube we hear a pop sound.
2. This reactiin is slightly exothermic. Touching the testube we can fell warmth.
______
Hope it helps. then mark it
93 votes
Thanks 141
Kritip
Thanks milan
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Answers & Comments
Zn + 2HCl ---》 ZnCl2 + H2 gas
1. We find bubbles of H2 coming out.
As a confirmation if we put a flame near the test tube we hear a pop sound.
2. This reactiin is slightly exothermic. Touching the testube we can fell warmth.
______
Hope it helps. then mark it