Question #cda49
1 Answer
The pH of the solution will be equal to 10.1.
Sodium hypochlorite will dissociate in aqueous solution to give sodium cations,
The hypochlorite anions will act as a base and react with the water to form hypochlorous acid,
Now use an ICE table to solve for the concentration of hydroxide ions.
I......0.081......................................0.................0
C.......(-x)......................................(+x)..............(+x)
E....0.081-x....................................x.................x
By definition, the base dissociation constant will be
Because the base dissociation constant is so small, you can approximate (0.081 - x) with 0.081. This will get you
This will be equal to the concentration of the hydroxide ions
The solution's pOH will be
Thus, the solution's pH will be