What is the pH for a neutral solutions at the normal temperature of the human body

Options

A. `7.2`
B. `14.0`
C. `6.8`
D. `6.0`

Answer

C

Explanation

At room temperature `K_(w)` for water = `1 xx 10^(-14)` .So pH at `25^(@)C = 7 `
At human body temperature `( approx 37^(@)C)` the `K_(w)` for water will slightly increase so pH will slightly decrease to say 6.8 .