Question

Examine the following chemical equation, which shows only the reactions and one product.

Zn + 2HCl → ZnCl2 +?

How many H atoms must be present in the second product that is formed?

a.2

b.1

c.3

d.4

Answer 1

Answer:

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Answer 2

Concept:

Displacement  reaction is the one in which the atom or a set of atoms is displaced by another atom in a molecule. For instance, when iron is added to a copper sulphate solution, it displaces the copper metal.

                             A + B-C → A-C + B

The above equation exists when A is more reactive than B.

Given:

Examine the following chemical equation, which shows only the reactions and one product.

Find;

Zn + 2HCl → ZnCl₂ +?

How many H atoms must be present in the second product that is formed?

Solution:

Zn + 2HCl → ZnCl₂ +H₂

Therefore, the no. of hydrogen atoms =2

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