Question

In: Chemistry

What is the pH of a 0.260 M solution of H2SO4? Ka2 = 1.20×10^–2?

Expert Solution

Sulphuric acid ionises into two steps.

For the first step,

This is because sulphuric acid is completely dissociated in the first step.

An ICE table is made for econd step


Initial concentration (M)	0.260	0	0.260
Change in concentration (M)	-x	+x	+x
Equilibrium concentration (M)	0.260-x	x	0.260+x

The equilibrium constant

Since Ka2 is small, we assume that x is small with respect to 0.260.

from second step.

Total

queen_honey_blossom answered 2 years ago

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