Question

The pH of a soft drink is 3.82. Its hydrogen ion concentration will be [MP PET 1990]
A) 1.96\times {{10}^{-2}}\,\,mol/l B) 1.96\times {{10}^{-3}}\,\,mol/l C) 1.5\times {{10}^{-4}}\,\,mol/l D) 1.96\times {{10}^{-1}}\,\,mol/l

Answer 1

Answer: Hydrogen ion concentration in soft drink will be $1.5\times 10^{-4} M$.

Solution:

pH is the measure of hydrogen ion concentration in a solution.

Mathematically,

$pH=-log([H^+])$

pH of the soft drink = 3.82

Concentration of hydrogen ion can be calculated by using above equation, we get:

$3.82=-log[H^+]$

$[H^+]=antilog(-3.82)=0.00015 M= 1.5\times 10^{-4} M$

The correct option is C.

Answer 2

Answer:

Explanation:

D