Question

A few drops of liquid 'X' were added to distilled water. It was observed that pH of the water is increased . The liquid 'X' would be

a. lemon juice b. NaCl solution c. Na2Co3 D. . diluteHCL

Answer 1

The liquid 'X' would be  

c) Na2CO3

cause increase in pH means some basic is added and Na2CO3 is basic

Answer 2

Na₂Co₃ (option C) would be the liquid 'X,' which raised the pH of the water.

• The capacity of a liquid substance to dissociate H+ or hydronium ions into the solution determines its pH.

• The pH scale of liquids is given below:

• Acidic substances have a pH range of 1 to 6.9.
• The pH of a neutral solution is 7.
• pH ranges from 7.1 to 14 for basic substances.

1. Due to the presence of citric acid, lemon juice has an acidic pH of 1 to 2.
2. NaCl is a pH-neutral neutralizing solution.
3. The pH of Na₂Co₃ is 11 (basic or alkaline).
4. The pH of dilute HCl is 1.

• On adding liquid 'X' to the water, the pH of the water rises to greater than 7. As a result, the liquid used is alkaline in nature, which is Na₂Co₃.