f Ka of a weak acid HA is 10–5 then Kh for NaA will be

The question is asking for the calculation of the hydrolysis constant (Kh) for the salt of a weak acid. The hydrolysis constant (Kh) can be calculated using the ionization constant of water (Kw) and the acid dissociation constant (Ka) of the weak acid.

Here are the steps to calculate Kh:

1. Identify the given values. In this case, Ka = 10^-5 and Kw (the ionization constant of water) is typically 10^-14 at 25 degrees Celsius.

2. Use the formula Kh = Kw / Ka to calculate the hydrolysis constant.

3. Substitute the given values into the formula: Kh = 10^-14 / 10^-5

4. Simplify the equation to find Kh. In this case, Kh = 10^-9.

So, the hydrolysis constant (Kh) for NaA will be 10^-9.