Question

Choose weak acids from the following:

CH3COOH , H2SO4 , HNO3 , H2CO3​

Answer 1

The weak acids from the following given compounds are: $CH_{3} COOH,H_{2} CO_{3}$

Explanation:

1. Strong acids are defined as those acids which when dissolved in water completely dissociate into ions.
2. Weak acids are acids when dissolved in water partially dissociate into ions.
3. $H_{2} SO_{4} , HNO_{3}$  are the strong acids as they completely dissociate into the water to give hydrogen ions.
4. $CH_{3} COOH,H_{2} CO_{3}$ are the weak acids as they are partially dissolved in water to give hydrogen ions.

Answer 2

$CH_{3} COOH,H_{2} CO{3}$ are the weak acid among the following

Explanation:

1.$CH{3}COOH$→$CH{3}COO^{-} + H^{+}$,CH3COOH is a weak acid because it ionizes only partially in aqueous solution to form H+ and CH3COO– ions.  

2.Therefore the nature of CH3COO– is basic, and we call CH3COO– the conjugate base of CH3COOH. It is in equilibrium with its ions in water and its conjugate (CH3COO–, a weak base) is also in equilibrium in water.

3. They are partially dissolved in water to give hydrogen ions.Weak acids are acids that don't completely dissociate in solution. In other words, a weak acid is any acid that is not a strong acid.

4.The strength of a weak acid depends on how much it dissociates: the more it dissociates, the stronger the acid.