Sulfuric acid, H2SO4(aq), can neutralize an aqueous solution of calcium hydroxide, Ca(OH)2(aq). What is the formula for the salt produced by this neutralization reaction?
- Mayya Alocci
- Sep 18
- 1 min read
Regents Chemistry Exam June 2025 Question 44
44 Sulfuric acid, H2SO4(aq), can neutralize an aqueous solution of calcium hydroxide, Ca(OH)2(aq). What is the formula for the salt produced by this neutralization reaction?
(1) Ca2SO4 (3) CaSO3 (2) Ca(SO2)2 (4) CaSO4
Solution:
The reaction between an acid and a base produces water and salt. To predict the products, we simply have to exchange the partners of the two compounds. H2SO4+ Ca(OH)2 = H + OH and Ca+ SO4. Ca has an oxidation number of +2 as seen on the Periodic Table and SO4 has an oxidation number of -2 as seen on the Polyatomic ion chart. Since they have the same oxidation numbers, their numbers will cancel each other and we get CaSO4. Choice 4 is the correct answer.
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