Question

Hydrochloric acid (HCl) and sodium hydroxide (NaOH) react to form water and sodium chloride (NaCl). If you have 2.87 g of HCl, 3.75 g of water, and 1.98 g of NaCl, how many grams of NaOH were reacted? Your answer should go to the hundredths place.

Answer 1

2.86g

Step-by-step explanation:

Mass of HCl = 2.87g

Mass of water = 3.75g

Mass of NaCl = 1.98g

Unknown:

Mass of NaOH reacted = ?

Solution:

The reaction expression is given as:

HCl + NaOH → NaCl + H₂O

According to the law of conservation of mass, the mass of reactants and products must be the same.

Mass of HCl + Mass of NaOH = Mass of NaCl + Mass of H₂O

2.87g + Mass of NaOH = 1.98g + 3.75g

Mass of NaOH = 1.98g + 3.75g - 2.87g = 2.86g