Question

When baking soda is mixed with vinegar, bubbles are formed with the evolution of a gas. a. Write the word equation of the above reaction.
b. What happens when this gas is passed through lime water? Also, write chemical equation for this change.

Answer 1

The reaction between baking soda and lemon juice can be given as below.

(Citric acid)

Lemon juice

​

+Baking soda⟶

(Sodium hydrogen carbonate)

CO

2

​

(bubbles)

​

+

(Carbon dioxide)

Other substances

​

Since a chemical reaction is taking place which can't be reversed, it is a chemical change.

Answer 2

a. Write the word equation of the above reaction.

Answer - Acetic acid present in vinegar will readily react with baking soda (sodium bicarbonate) to form sodium acetate with the effervescence of carbon dioxide.

b. What happens when this gas is passed through lime water?

Answer - This gas is carbon dioxide(CO2). When carbon dioxide is passed through lime water, the lime water turns milky.

c. Also, write the chemical equation for this change.

Answer - CH3COOH + NaHCO3 → CH3COONa + CO2 + H2O

Here CH3COONa is a salt and its chemical name is Sodium Acetate.