Malonic acid is an organic dibasic acid such as `H_(2)S` having first ionistion constant, `K_(1) = 1.42 xx 10^(-3)` and second ionisation constant, `K_(2) = 2.0 xx 10^(-6)`. Compute the divalent molanate ion concentration in:
a. `0.001M` malonic acid.
b. a solution that is `0.0001 M` in malonic acid and `0.1 M HC1`.

Explanation

To solve the problem of calculating the concentration of the divalent malonate ion (A²⁻) in two different scenarios involving malonic acid (H₂A), we will follow these steps:

### Part A: Concentration of A²⁻ in 0.001 M Malonic Acid

1. **Define the ionization reactions**:
- The first ionization of malonic acid (H₂A) is:
\[
H_2A \rightleftharpoons H^+ + HA^-
...