Question

Which among the following statement is/are correct?

• A. $pH=-{\log }_{10}\left[H_3{O}^{+}\right]$ for dilute solution
• B. $pH$ of $H_{2}O$ decreases with the increase of temperature
• C. $pH$ can not be more than 14
• D. If a solution is diluted ten times, its $pH$ always increases by 1

Answer 1

Answer: (A), (B)

$pH=-{\log }_{10}\left[H_3{O}^{+}\right]$ for dilute solution
$pH$ of $H_{2}O$ decreases with the increase of temperature

$pH=-{\log }_{10}\left[H_3{O}^{+}\right]=-log\left[H^{+}\right]$ for dilute solution and as temperature increases ionisation increases so conc. of hydrogen ion increases and pH decreases.