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0.90 g of hydrogen chloride (hcl) is dissolved in water to make 4.0 l of solution. What is the ph of the resulting hydrochloric acid solution?



Answer :

If 0.90 g of hydrogen chloride (HCl) is dissolved in water to make 4.0 l of solution. The pH of the resulting hydrochloric acid solution is 2.2

Given,

mass of HCl = 0.90 g

Volume of solution = 4 L

Calculation of number of moles of HCl

number of moles = given mass/molar mass

= 0.90/ 36

= 0.025 mol.

Calculation of molarity of HCl

Concentration = number of moles/volume

= 0.025/4

= 0.00625M

Calculation of pH

pH = -log[H+]

= -log(0.00625)

= 2.2

Thus, we calculated that the pH of given solution is 2.2.

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