Answer:
A. a weak acid and a strong base
Step-by-step explanation:
An acid-base reaction is a chemical reaction between an acid and a base to form salt and water. The reaction is also known as a neutralization reaction.
An acid is a compound that when in aqueous solution it dissociate to form an hydrogen ion(H+).
A base is a compound that when in aqueous solution it produces an hydroxide ion(OH-) .
A strong acid is an acid that completely dissociate in an aqueous solution.
A strong base is a base that completely dissociate in an aqueous solution.
The reaction that produce a salt like sodium carbonate is a chemical reaction between a weak acid and a strong base. The chemical reaction can be represented as follows
H2CO3 + 2NaOH → Na2CO3 + 2H2O
H2CO3 is a weak acid as it partially dissociate in aqueous solution.
NaOH is a strong base as it completely dissociate in aqueous solution.