Chemistry, 19.10.2019 07:30 alex6toes

Which of the following is a net ionic equation that best represents a weak acid-strong base reaction?

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Answer from: sonnyboi2305

H3BO3 (aq) + OH− (aq) arrow BO3− (aq) + H2O (l)

Answer from: DarcieMATHlin819

This question is incomplete but the completed question is below

Which net ionic equation best represents a weak acid-strong base reaction?

(a) H₃BO₃ (aq) → BO₃⁻ (aq) + H₂O (l)

(b) 2 OH⁻ (aq) → H₂O (l)

(d) H₃BO₃ (aq) + KOH (aq) → KBO₃ (aq) + H₂O (l)

The correct option is c

Explanation:

The reaction between an acid and a base is called neutralization reaction. Neutralization reaction is the reaction between an acid and a base to produce salt and water. Here, the metal from the base dissociates (leaving OH⁻) and binds to the non-metal in the acid which forms the salt (in the product). When the acid dissociates, the hydrogen ion (H⁺) from the acid binds with the hydroxyl group (OH⁻) of the base to form water.

A strong acid is an acid that dissociates completely in water (example is HCl) while a weak acid dissociates partially in water (example is H₃BO₃). Similarly, a strong base is a base that dissociates completely in water (example is NaOH) while a weak base is a base that dissociates partially in water (NH₃).

From the above explanation, it can be deduced that the correct option is c because H₃BO₃ (boric acid) dissociates to form hydroxyl ion (H⁺) and borate ion (BO₃³⁻) as shown below

H₃BO₃ → H⁺ + BO₃³⁻

This H⁺ (in the product) ionically reacts with the OH⁻ to form H₂O hence the complete/net ionic equation is

H₃BO₃ + OH⁻ → BO₃⁻ + H₂O

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