And another ‘juicy’ / stretching buffer question :)

The Ka of hydrofluoric acid, HF, is 6.7×10-4 mol dm-3. A 500 cm3 sample is available to make a buffer solution, along with a 200 cm3 of 0.80 mol dm-3 solution of the base, Mg(OH)2.

What volume of acid is needed to make a buffer solution with pH = 3.00?

3 thoughts on “And another ‘juicy’ / stretching buffer question :)

  1. I thought I had made a comment about this in the post previously – but for some reason it doesn’t seem to have ‘survived’ somehow 😦

    Anyway, for the purpose of doing this question, we will ignore the poor solubility of Mg(OH)2 [Given we are dealing with the acidic region, it’s a fairly safe assumption], plus you’re only a ‘Google click’ away from discovering the Ksp value – should you really wish to consider it! :D.


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