Answer:
Acid = H₂O, Conjugate Acid = HCN
Step-by-step explanation:
The Chemical equation is given as;
CN⁻ + H₂O ⇄ HCN + OH⁻
base + acid ⇄ Conj A + Conj B
To determine whether a substance is an acid or a base, we count number of hydrogen atoms on each substance before and after the reaction. If the number of hydrogen atoms has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogen atoms has increased that substance is the base (accepts hydrogen ions).
The acid in the above equation is H₂O because it donates an hydrogen ion to CN⁻
A conjugate acid contains one more H atom and one more + charge than the base that formed it.
The COnjugate Acid is HCN