The equivalent weight of a compound is the weight of the compound that reacts with or replaces one equivalent weight of hydrogen. In the given reaction, the equivalent weight of H2SO4 can be calculated by understanding the stoichiometry of the reaction between H2SO4 and NaOH.

The balanced chemical equation for the reaction is:

H2SO4 + 2NaOH → Na2SO4 + 2H2O

From the equation, it can be observed that for every 1 mole of H2SO4, 2 moles of NaOH react. Therefore, the equivalent weight of H2SO4 is equal to its molecular weight divided by the number of moles of NaOH that react with 1 mole of H2SO4.

To calculate the equivalent weight of H2SO4, we first need to determine the molecular weight of H2SO4. Hydrogen (H) has a molecular weight of 1, sulfur (S) has a molecular weight of 32, and oxygen (O) has a molecular weight of 16. Thus, the molecular weight of H2SO4 is:

2(1) + 32 + 4(16) = 98 g/mol

Now, we need to determine the number of moles of NaOH that react with 1 mole of H2SO4. From the balanced equation, we can see that 2 moles of NaOH react with 1 mole of H2SO4. Therefore, the equivalent weight of H2SO4 is:

98 g/mol / 2 = 49 g/equivalent

Hence, the equivalent weight of H2SO4 in the given reaction is 49 g/equivalent.

In summary:
- The balanced chemical equation for the reaction is H2SO4 + 2NaOH → Na2SO4 + 2H2O.
- The molecular weight of H2SO4 is calculated to be 98 g/mol.
- The number of moles of NaOH that react with 1 mole of H2SO4 is 2.
- Therefore, the equivalent weight of H2SO4 is 49 g/equivalent.