Given the equation representing a system at equilibrium:CO3^2-(aq) + H2O(l) ⇌ HCO3-(aq) + OH-(aq)Which statement describes the base in the forward reaction?
- Mayya Alocci
- Sep 25
- 1 min read
Regents Chemistry Exam June 2025 Question 49
49 Given the equation representing a system at equilibrium:CO3^2-(aq) + H2O(l) ⇌ HCO3-(aq) + OH-(aq)
Which statement describes the base in the forward reaction?
(1) The H2O(l) is the base because it accepts an H+ ion.
(2) The H2O(l) is the base because it donates an H+ ion.
(3) The CO3^2-(aq) is the base because it accepts an H+ ion.
(4) The CO3^2-(aq) is the base because it donates an H+ ion.
Solution:
A base is a subtance that accepts a proton (H+) In the equation, looking from left to right, we see CO3^2- accepting an H+ ion to become HCO3-. Choice 3 is the correct answer.
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