Question

Solution A has $pH = 3$ and solution $B$ has $pH = 6$. Which one of the following is correct?

• A. Solution $A$ is twice as acidic as $B$
• B. Solution $B$ is twice as acidic as $A$
• C. Solution $A$ is $1000$ times more acidic than $B$
• D. Solution $B$ is $1000$ times more acidic than $A$

Answer 1

Answer: (C)

In $A, [H^+] = 10^{-3}\, M$. In $B, [H^+] = 10^{-6}\, M$. Hence, $A$ is $1000$ times more acidic than $B$.