Calculate how many grams of sodium hydroxide are needed to completely neutralize a solution

Calculate how many grams of sodium hydroxide are needed to completely neutralize a solution containing 9.8 grams of sulfuric acid.

Let us write the equation for the reaction of complete neutralization (formation of medium salt):

2NaOH + H2SO4 = Na2SO4 + 2H2O

Let’s find the amount of sulfuric acid substance:

v (H2SO4) = m (H2SO4) / M (H2SO4) = 9.8 / 98 = 0.1 (mol).

According to the reaction equation, 2 mol of NaOH reacts with 1 mol of H2SO4, therefore:

v (NaOH) = v (H2SO4) * 2 = 0.1 * 2 = 0.2 (mol).

Thus, the required mass of sodium hydroxide is:

m (NaOH) = v (NaOH) * M (NaOH) = 0.2 * 40 = 8 (g).

Answer: 8 g.