The volume of an HCl waste is 10000 mL. It has a pH of 2.0. A small bottle contains 1.0 g of Ca(OH)₂. Show the neutralization reaction between hydrochloric acid and calcium hydroxide. Determine how many milliliters (in 1 s.f.) of the HCl waste can be neutralized by two small bottles of Ca(OH)₂.

• A. Neutralization reaction: 2 HCl(aq) + Ca(OH)₂(s) → Ca(s) + Cl₂(g) + 2 H₂O(l)V_HCl = 1000 mL
• B. Neutralization reaction: 2 HCl(aq) + Ca(OH)₂(s) → Ca(s) + Cl₂(g) + 2 H₂O(l)V_HCl = 2000 mL
• C. Neutralization reaction: 2 HCl(aq) + Ca(OH)₂(s) → CaCl₂(aq) + 2 H₂O(l)V_HCl = 5000 mL
• D. Neutralization reaction: 2 HCl(aq) + Ca(OH)₂(s) → CaCl₂(aq) + 2 H₂O(l)V_HCl = 10000 mL

Answer: (C)