00:01
Let's calculate the chloride ion concentration in a saturated solution of sodium chloride.
00:08
Start with our equilibrium expression here.
00:13
Ksp is equal to concentration of n .a.
00:18
Plus.
00:19
It comes a concentration of cl minus.
00:22
Let's calculate the delta g knot for this reaction here, which will be delta g0 for the formation for the products, minus delta g not for the reactants this would be delta g not formation n a plus plus delta g not formation of c l minus minus delta g not formation of nacl solid let's plug in these values here this is negative 262 kilojoules plus negative 1 131 kilojoules minus 384 kilojoules.
01:28
This would be equal to minus 9 kilojoules or minus 9 ,000 joules.
01:55
Delta g0 is equal to negative rt lon of the equilibrium constant.
02:01
So let's solve this for ksp.
02:05
The ksp here is equal to delta g0 over negative rt, negative 9 ,000 joules over minus 8 .3145 joules per mole kelvin.
02:22
Temperature in kelvin's is 298 kelvin, and we'll find that this is equal to 3 .3 .000...