00:01
I need to find how much of magnesium hydroxide i can dissolve.
00:05
So, in order to answer this question, i need to know the ksp, which is 1 .4 times 10, negative 11.
00:14
And i also need to know the model.
00:19
Now let's move on to question a.
00:21
Here that's 250 millilitres of pure water.
00:26
It means that in this case when magnesium hydroxide is dissolved, it forms magnesium 2 plus, and 2 -oh -h -minesh -mh -mensh -p is the concentration of magnesium 2 plus times the squared of o -h -twice.
00:43
And then that is s times 2 -s squared which is 4x cubed.
00:49
Now let's find s.
00:59
1 .50 now let's find the mass.
01:04
The mass is 0 .250 liters times this concentration which is just calculated, multiply by the molar mass...