In the given equation HCN + OH⁻ ⇄ H₂O + CN⁻, the Bronsted-Lowry acids and bases are as follows:
Acids: HCN, H₂O
Bases: OH⁻, CN⁻.
Hence, option C is correct.
According to the theory of Bronsted-Lowry acid-base:
An acid is defined as a species that donates H⁺.
A base is defined as a species that accepts H⁺.
Now consider the following equation.
HCN + OH⁻ ⇄ H₂O + CN⁻
Clearly we can see that:
HCN donates H⁺ to OH⁻, hence it is an acid.
OH⁻ accepts H⁺ from HCN, hence it is a base.
H₂O donates H⁺ to CN⁻, hence it is an acid.
CN⁻ accepts H⁺ from H₂O, hence it is a base.
Therefore, the Bronsted-Lowry acids and bases are as follows:
Acids: HCN, H₂O
Bases: OH⁻, CN⁻.
The question is incomplete, the complete question is:
Choose the Brønsted-Lowry acids and bases in the following equation: HCN + OH=H2O + CNC
A) acids HCN, CNº bases OH, H20
B) acids CN, OH bases HCN, H2O
C) acids HCN, H20 bases OH", CN
D) acids OH", H20 bases CN", HCN
E) acids HCN, OH bases H20, CN
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