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pH of buffer solution

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1) A buffer is prepared by adding 0.200 mol of sodium lactate ( NaC3H5O3) to 500ml of 0.5 M lactic acid ( Ka = 1.4 x 10^-4).

A) What is the pH of the buffered solution?

B) What is the pH after 100ml of 0.100 M HCL is added to the buffer?

C) What is the pH after 12 g of NaOH is added to the original solution prepared in A?

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Solution Summary

The solution shows how to calculate the pH of a buffered solution. It also investigates the impact of adding acid and base solution on the buffer solution (see attachment).

See Also This Related BrainMass Solution

Buffer solution Problem to determine pH

1.A buffer solution is prepared which consists of 0.100M HC2H3O2 and 0.100M NaC2H3O2, the dissociation constant, Ka of HC2H3O2 is 1.74 x 10^-5

Determine the pH after the addition of 10.0ml of 0.1M NaOH to 100.00ml of this buffer.

2. An aqueous solution of 100.0ml 0.100M NaCl is titrated with 0.100M AgNO3 (AgCl Ksp= 1.0x10^-10) pAg=-log[Ag+]

A. Calculate the pAg of the solution after 20.0ml of AgNO2 solution is added.

B. Calculate the pAg of the solution after 110.0ml of AgNO3 solution is added.

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