00:01
To calculate the solubility of calcium hydroxide, we first need the ksp equilibrium reaction.
00:07
Calcium hydroxide, as a solid, will dissociate into one calcium ion and two hydroxide anions.
00:19
So ksp is going to be equal to the concentration of calcium multiplied by the concentration of hydroxide.
00:28
Equilibrium constants are always concentrations of products raised to their coefficients, divided by concentrations of reactants, but we exclude solids and liquids.
00:41
So if we know our ksp value, the numerical value is given to us at 4 .96 times 10 to the negative 6, then ksp 4 .96 times 10 to the negative 6, will be equal to the calcium concentration, ca2 plus, multiplied by the hydroxide concentration.
01:09
But the hydroxide concentration is provided from a secondary source, sodium hydroxide...