Activity 2.11 NCERT Class 10 Science, Acids, Bases and Salts

Activity 2.11 NCERT Class 10 Science, Chapter 2 Acids, Bases, and Salts

Procedure:

Activity 2.11 asks us to find the PH of various substance.

Observation:

The average PH of different food materials are the following:

Saliva PH before the meal: 7.4, After the meal: Depends on the food taken. If acidic food like eggs, meat, juice etc is taken PH goes down. If Alkaline food is taken like vegetables, grain, PH may rise upto 8

Lemon Juice: 2.2

Colourless aerated drink: 4

Carrot Juice: 6

Coffee: 4.5

Tomato Juice: 4.3

Tap water: 6 to 8.5

1M NaOH: 14

1M HCl: 0

Next: PH of Soil, Activity 2.12.

Read also: Dissolution of sulfuric acid in the water, Activity 2.10.