Question

At 900 K, ${pK}_w$ is 13. At this temperature an aqueous solution with $pH=7$ will be:

• A. acid
• B. basic
• C. natural
• D. none of these

Answer 1

The correct option is B basic

When $p{K}_w$=13, its neutral $pH$ is 6.5. When the $pH$ is greater than 6.5, it is basic and less than 6.5, it is acidic. So, when $pH$=7, it is basic.