Posted by Anonymous on .
Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 2.1 x 102 Ka (HX) = 7.3 x 108
Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 9 x 105 Ka (HX) = 5.3 x 1011

chemistry 
DrBob222,
#1 I believe is just the pH of the salt acting as an acid.
..............HX^ ==> H^+ + X^2
initial.......0.1......0......0
change........x.......x.......x
equil.......0.1x......x.......x
Set up k1 and solve for x. You will not be able to solve without using a quadratic equation.
4). This one looks amazingly like NaHCO3 for which (H^+) = sqrt(k1k2)