Hydroselenic acid, H2Se, is a diprotic acid with pKa,1 = 3.89 and pKa,2 = 11.01 at...
Hydroselenic acid, H2Se, is a diprotic acid with pKa,1 = 3.89 and pKa,2 = 11.01 at 25 °C.
For 0.147 mol L−1 H2Se(aq) at 25 °C, calculate:
(a) the fraction, α1, of H2Se that exists in the singly-ionized form, HSe−
α1 =
(Enter a number between 0 and 1, accurate to 2 significant figures.)
(b) the equilibrium concentration of the doubly-ionized form, Se2−
[Se2− ]eq = mol L−1
(Enter a number accurate to 2 significant figures.)
(c) the pH
pH =
(Enter a number accurate to 2 decimal places.)
Homework Answers
(a) fraction, alpha1 = 0.029
(b) [Se2-]eq = 9.8 x 10-12 mol L-1
(c) pH = 2.37
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Hydroselenic acid,
H2Se, is a diprotic acid with pKa,1
= 3.89 and pKa,2 = 11.01 at...
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