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

The Correct Option is A

$Δ[H^+]=1000$
$ΔpH=−logΔ[H^+]=−log10^3$
=$−3$
$\text{The Correct Option is (A):}$ $\text{decreases by 3 units}$

Answer 2

The change in hydrogen ion concentration by a factor of 1000 corresponds to a change in pH, which is calculated using the following formula: $$\Delta pH = -\log[\Delta H^+] = -\log[10^3] = -3$$ This shows that the pH decreases by 3 units, as the hydrogen ion concentration increases by a factor of 1000.