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Anna007 [38]
2 years ago
9

If 200 mg of HCl is added to water to achieve a final volume of 1L, what is the final pH?

Chemistry
2 answers:
Anvisha [2.4K]2 years ago
8 0

hope this helps ..................

miskamm [114]2 years ago
5 0

Answer:

The pH of the solution is 2.26 .

Explanation:

Mass of HCl = 200 mg = 0.200 g

1 mg = 0.001 g

Moles of HCl =n=\frac{0.200 g}{36.5 g/mol}=0.005479 mol

Volume of the solution ,V= 1 L

Molarity of HCl solution = \frac{n}{V}

[HCl]=\frac{0.005479 mol}{1 L}=0.005479 mol/L

1 mole of HCk gives 1 mole of hydrogen ion and 1 mole of chloride ions.

[HCl]=[H^+]=[Cl^-]=0.005479 mol/L

The pH of the solution is negative logarithm of hydrogen ion concentration:

pH=-\log[H^+]

pH=-\log[0.005479 mol/L]=2.26

The pH of the solution is 2.26 .

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