Question

What would you observe on adding diluted HCL acid to (i) Sodium bicarbonate placed in a test tube. (ii) Zinc metal in a test tube.

Answer 1

Answer:

(i) The reaction between hydrochloric acid and sodium bicarbonate is exothermic.

(ii)When dilute hydrochloric acid is added to granulated zinc placed in a test tube, a colourless and odourless gas is evolved with bubbles.

The chemical reaction can be written as:

Zn + 2HCl → ZnCl

2

+ H

2

Answer 2

Answer:

(i) The reaction between hydrochloric acid and sodium bicarbonate is exothermic.

(ii)When dilute hydrochloric acid is added to granulated zinc placed in a test tube, a colourless and odourless gas is evolved with bubbles.

The chemical reaction can be written as:

Zn + 2HCl → ZnCl

2

+ H

2

Explanation:

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