### Ionic Equilibrium Question 4

#### Question 4 - 25 January - Shift 2

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

(1) increases by 1000 units

(2) decreases by 3 units

(3) decreases by 2 units

(4) increases by 2 units

## Show Answer

#### Answer: (4)

#### Solution:

#### Formula: Calculation of pH

$\Delta[H^{+}]=1000$

$ \begin{aligned} & \Delta pH=-\log \Delta[H^{+}]=-\log 10^{3} \\ & =-3 \end{aligned} $