Identify the acid(A), base(B), conjugate acid(CA) and conjugate (B) in the reaction between carbonic acid and sodium hydroxide.

Acid : H₂CO₃

Base :  OH⁻

Conjugate Base(CB) : CO₃²

Conjugate Acid(CA) : H₂O

Further explanation

According to Bronstead-Lowry

Acid = proton donor (H +)

Base = proton acceptor (H +)

The conjugate base is the acid that has given the proton

A conjugate acid is a base that has accepted a proton

The conjugate acid ⇄ base + H +

Base + H + ⇄ Conjugate acid

Bronstead-Lowry  reaction for acid-base :

HA(acid) + B⁻(base) ⇒ A⁻(CB) + HB(CA)

Reaction

H₂CO₃ + NaOH ⇒ Na₂CO₃ + H₂O

H₂CO₃(acid) + OH⁻(base) ⇒ CO₃²⁻(CB) + H₂O(CA)

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Deposition is the transition of matter going from gas to solid without passing through the liquid phase.a.) gas—-> solid