Question

When the hydrogen ion concentration $\left[H^{+}\right]$changes by a factor of $1000$ , the value of $pH$ of the solution_____

• A. decreases by 3 units
• B. decreases by 2 units
• C. increases by 2 units
• D. increases by 1000 units

Answer 1

Answer: (A)

$\Delta \left[H^{+}\right]=1000$
$\Delta pH=-\log \Delta \left[H^{+}\right]=-\log 10^3$
$=-3$