Question

When a bit of baking soda is added to vinegar in a test-tube, a hissing sound is heard and several bubbles occur. The test tube is closed and attached by a glass tube to another test tube containing lime water. The limewater slowly turns milky in the process. This is shown in the following experimental setup.

Answer 1

Answer:

gas released is CO2

Explanation:

CO2 turns limewater milky

Answer 2

In the given setup CO₂ (Carbon dioxide) gas is liberated.

Given

1. Baking soda added to vinegar.

• Baking soda is NaHCO3 -Sodium bicarbonate.
• Vinegar is CH3COOH - Acetic acid.

      NaHCO3 + CH3COOH → CO2 + H2O + Na CH3COO

    2.  The hissing sound heard is due to the liberation of the gas.

    3. Gas passed through limewater turns it milky, therefore the gas liberated is Carbon dioxide.

• CO2 + Ca(OH) → Ca(CO)3.