Chemical EquilibriumHard
Question
The equilibrium constant for the reaction: H3BO3 + Glycerin$\rightleftharpoons$ (H3BO3 + Glycerin complex) is 0.90. How much glycerin should be added to 1 L of 0.10 M-H3BO3 solution, so that 60% of the H3BO3 is converted to boric acid–glycerin complex?
Options
A.Infinite
B.1.73 M
C.0.10 M
D.2.27 M
Solution
H3BO3 + Glycerin $\rightleftharpoons$ Complex
Initial concert 0.1 a M 0
Equ. Concert 0.1 – 0.06 (a – 0.06) M 0.06 M
= 0.04 M
Now, $K_{eq} = 0.9 = \frac{0.06}{(0.04) \times (a - 0.06)} \Rightarrow a = 1.73\text{ M}$
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