Calculate the mass of sodium hydroxide required to obtain 117 g of sodium chloride by reacting sodium hydroxide with hydrochloric acid.

NaOH + HCL = NaCL + H2O
n (NaCL) = m / M = 117 / 58.5 = 2
according to the reaction equation n (NaOH) = n (NaCL) = 2 mol
M (NaOH) = nM = 2 * 40 = 80 g
Answer: M (NaOH) = 80 g



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.