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pH of buffer solution

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Hydrofluoric acid (HF) has an equilibrium constant Ka value of 7.2 x 10^- 4.

Part a: 0.250 mol of F-- ions (in the form of NaF) are added to 1.0 Liters of 0.1 mol L-1 aqueous HF. Calculate the resulting pH?

Part b: The solution produced in (part a) is added 10.0 ml of 5.0 mol L-1 NaOH. Calculate the resulting PH?

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It shos who calculate the pH of HF solution when NaF and NaOh are added, respectively. The solution is detailed and well presented.

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Hydrofluoric acid (HF) has a Ka value of 7.2 x 10 ^ - 4.

Part a: 0.250 mol of F - ions (in the form of NaF) are added to 1.0 Liters of 0.1 mol L-1 aqueous HF. Calculate the resulting PH?
The initial concentration of HF is 0.1 mol/ 1L = 0.1 M
When 0.250 mol of F- is added to ...

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