Question

You are given a conical flask containing zinc granules. It is fitted with a thistle funnel and a
delivery tube. You are asked to put a few drops of dilute hydrochloric acid into it.
(2)
a) What do you observe?
b) Name the type of reaction.
c) Is it a physical or chemical change?
d) Write the chemical equation involved.​

Answer 1

Answer:

1 We can observe the production of H2 gas.

2 The H2 gas burns with a pop sound.

3 Exothemic reaction

4 Chemical change

5 Zn + 2HCl -> ZnCl2 +H2

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Answer 2

a) the hydrochloric acid will react with zinc granules to produce a gas which bubbles up.

the gas is hydrogen

b)the reaction is called single displacement reaction. which the zinc displaces hydrogen in the reaction due its highly reactive element than hydrogen, to form a salt name zinc chloride.

c) 2Zn(s) + 2HCl(l) reacts to make 2ZnCl(l) + H2(g) this equation is balanced for you.