Question

How many moles of calcium chloride will be produced from 22.9 g of hydrochloric acid?

Answer 1

0.314 moles

Step-by-step explanation:

We are given;

• Mass of HCl is 22.9 g

We are required to determine the number of moles of CaCl₂

• Assuming the equation for the reaction in question is;

2HCl + Ca(OH)₂→ CaCl₂ + 2H₂O

Step 1: Determine the number of moles of HCl

Moles = Mass ÷ Molar mass

Molar mass = 36.46 g/mol

Moles of HCl = 22.9 g ÷ 36.46 g/mol

= 0.628 moles

Step 2: Determine the number of moles of CaCl₂

From the equation 2 moles of HCl reacts to produce 1 mole of CaCl₂

Thus, moles of CaCl₂ = Moles of HCl × 1/2

= 0.628 moles × 1/2

= 0.314 moles

Thus, the number of moles of CaCl₂ is 0.314 moles