Question

calculate the ph of 0.04M HNO3 solution​

Answer 1

The pH of 0.04 M $HNO_3$ is 1.4

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7.

$HNO_3\rightarrow H^++NO_3^-$

According to stoichiometry:

1 mole of $HNO_3$ gives 1 mole of $H^+$

Thus 0.04 moles of $HNO_3$ give=$\frac{1}{1}\times 0.04=0.04moles$ of $H^+$

$pH=-\log [H^+]$

Putting in the values:

$pH=-\log[0.04]$

$pH=1.4$

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