pH of the given solution will be: 3
- Since pH is essentially a measure of the concentration of hydrogen ions in a substance, the letters pH stand for potential of hydrogen.
- pH less than 7 are acidic while pH greater than 7 are alkaline.
- We can find out pH of a solution or substance by negative logarithm of H+ ions present in that solution.
Given,
mass of nitric acid is 773mg = 0.773g
Molar mass of nitric acid is 63.01 mol
volume of solution is 180dm³
First we will obtain the concentration of Nitric acid by formula n = CV
C is the concentration
V is the volume of the solution
mass of acid is already provided in the question
we know that
no. of moles = given mass / molar mass
no. of moles of nitric acid = 0.773 / 63.01 = 0.12
C = n/V
C = 0.12 / 180 = 0.0006
We can find out pH by negative logarithm of H+ ( concentration)
pH = - log [ H+ ]
pH = - log [ 0.0006 ]
pH = 3.22 = 3
Therefore, pH of the solution is 3 (acidic)
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