The self ionization constant for pure formic acid, K = [HCOOH_(2^(+))][HCOO^(-)] has been estimated as 10^(-6) a room temperature. What percentage of formic acid molecules in pure formic acid are converted to formate ion? The density of formic acid is 1.22 g//cm^(3).

The self ionization constant for pure formic acid, K = [HCOOH_(2^(+))]

1.	The self ionization constant for pure formic acid, K = [HCOOH_(2^(+))][HCOO^(-)] has been estimated as 10^(-6) a room temperature. What percentage of formic acid molecules in pure formic acid are converted to formate ion? The density of formic acid is 1.22 g//cm^(3).
Answer» `0.037` `0.037` `0.37` `1.037` Solution :Give density of FORMIC acid `= 1.22 g//cm^(2)` weight of fromic acid in 1litre solution `= 1.22' 10^(3) g` `:' [HCOOH]= (1.22 XX 10^(3))/(46) = 26.5 M` `rArr K = [HCOOH_(2)^(+)] = 10^(-6)` `:' [HCOOH_(2)^(+)] = [HCOO^(-)]` `rArr [HCOOH]_("dissociated") = 10^(-3)` `:. (10^(-3))/(26.5) xx 100 = 0.0037`