WAEC - Chemistry (2018 - No. 31)
When chlorine is passed through a sample of water, the pH of the water sample would be
< 7
> 7
= 7
0
解释
\(Cl_{2} + H_{2}O \to HCl + HOCl\)
The two compounds in the product end are acidic and hence, their mixture is acidic. Hence, the pH is < 7