Answer to Question #81773 in General Chemistry for limiting reactants

Question

Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chlorideand liquid water. Suppose 18. g of hydrochloric acid is mixed with 37.2 g of sodium hydroxide. Calculate the minimum mass of hydrochloric acid that could be left over by the chemical reaction. Round your answer tosignificant digits.

Answer 1

Answer:

36.5 40

HCl + NaOH = NaCl + H2O

18 37.2

n=0.49315 moll (HCl) < n=0.93 moll (NaOH)

So that NaOH more than HCl, therefore mass of hydrochloric acid that could not be left by the chemical reaction. Mass of NaOH left over by the chemical reaction m=17.474 g ( (0.93 – 0.49315)x40 ).