Barrons SAT Subject Test Chemistry, 13th Edition

43. (D) H 2 SO 4 + 2NaOH → 2H 2 O + Na 2 SO 4 is the equation for this reaction.

1 mol H 2 SO 4 = 98 g. 1 mol NaOH = 40 g. Then 49 g of. The

equation shows that 1 mol of H 2 SO 4 reacts with 2 mol of NaOH for a ratio of

1:2. Therefore, mol of H 2 SO 4 reacts with 1 mol of NaOH in this reaction.

Since 1 mol of NaOH equals 40. g, and 80. g of NaOH is given, 40. g of it

will remain after the reaction has gone to completion.