Question

What is the pH of the buffer 0.10 M Na2HPO4/0.15 M KH2PO4?​

Answer 1

Answer:

Hydrogen phosphate ion is a weak base so it ionizes incompletely in water to dihydrogen phosphate ion and hydroxide ion.

The dissociation of hydrogen phosphate ion is represented by equation shown below;

The expression for the base dissociation constant of is;

…… (1)

We have. To calculate pH of the buffer solution, assume x M of hydrogen phosphate ion dissociates to form x M of hydroxide ion.

Construct ICE table and obtain the equilibrium concentrations as shown below:

Initial (M)

Change (M)

Equilibrium (M)

Explanation:

Plz mark me as brainliest