Explain why the equivalent weight of H2​SO4​is half the molar mass of this substance.

Explanation
1

Answer
The mass of an acid that can contain 1 mol H+ ions in an aqueous solution is known as its equivalent weight.

In an aqueous medium, H2SO4 dissociates as shown below:
H2SO4 = 2H + SO42-

In an aqueous medium,1 mol of gives 2 moles of H+ ions.

So, half mol of H2SO4 will give
As a result, H2SO4's equivalent weight is half that of its molecular weight.

When an excess amount of OH ions are reacting with H2SO4 each H2SO4 molecule will produce 2 mols of H+ ions. So the reaction will be
H2SO4 20H = 2H2O+SO42-