Question

Classify the following substance as per their $pH$ values i.e: $pH<7,pH=7,pH>7$.

1. Tamarind juice
2. Lemon juice
3. Soap water
4. Distilled water
5. Washing soda
6. Soda water
7. Tea

Answer 1

1. Tamarind juice is acidic in nature. Thus its $pH<7$.
2. Lemon juice is acidic in nature. This is because it contains citric acid. Thus its $pH<7$.
3. Soaps are formed from the strong base and a weak acid. Thus, they are basic in nature. Thus there $pH>7$.
4. Distilled water has $pH=7$ in the vacuum but in the atmospheric condition, it is slightly acidic with $pH<7$.
5. Washing soda is alkali in nature as it on dissociation give weak acid and strong base. Thus its $pH>7$.
6. Soda water is acidic in nature. Thus its $pH<7$.
7. Tea is also acidic in nature. Thus its $pH<7$