the effective pH range of the KF/HF (Ka=6.8x10^-4) buffer is? a) 2.2-4.2 b)1.2-4.2 c) 2.2-5.2 d)...

Question

Question

the effective pH range of the KF/HF (Ka=6.8x10^-4) buffer is?

a) 2.2-4.2

b)1.2-4.2

c) 2.2-5.2

d) all possible

Answer 1

Answer #1

ka = 6.8x104 pka = 109 (6.8x109) - 4-0.83250 = 3.1674 pka : 3.167 = 3.17 pH range is pkat , pka_1 , 3.167+1 Pranze = 3.167-1

Answer 2

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