00:01
Hello, here we have to solve the following problem.
00:04
At 75 degrees c, solubility of potassium nitrate is 155 grams in 100 grams of water.
00:15
And at 25 degrees c, the solubility drops to 38 grams in 25, oh sorry, in 100 degrees c of water.
00:27
Here, we have to calculate mass of potassium, nitrate which will crystallize out of solution if 420 grams of saturated solution was prepared at 75 degrees c let's solve this problem so first of all let's determine the composition of this 425 of the solution mass of potassium nitrate in this solution is 155 divided by 255 times 4255 grams.
01:45
So that is 258 .3 grams of potassium nitrate and let's calculate the amount of water.
01:55
That is total mass minus 258 .3 grams.
02:12
So it implies that at 25 degrees c, 166 .7 over 100 times 38 grams of potassium nitrate will be dissolved...