Abuffer solution is made using a weak acid, ha, with a pka of 5.28. if the ratio of a– to ha is 1.0 × 102, what is the ph of the buffer?

pH of a buffer solution can be calculated using the following equation:  

pKa is given as 5.28  

the ratio of A⁻ to HA is given as 1.0 × 10²

putting all the values in the equation;  

pH=5.28+log [1.0 × 10²]  

pH=7.28

SO, when a buffer solution is made using a weak acid, HA, with a pka of 5.28. if the ratio of A⁻ to HA is 1.0 × 10², the pH of the buffer is 7.28.

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