what is the maximum amount of KNO3 that can dissolve in 300 grams of water at 40 degree C. Solubility of KNO3 is 60g/100g at 40C.
how do i start to solve this?
If that is 60 g KNO3 per 100 g H2O, then
60 x (300/100) = ? g in 300.
so 180 g of KNO3?
Yes, unless the solubility figure is quote another way than what I listed.
60 g KNO3/100 g H2O is not the same as 60 g KNO3/100 g solution.
To solve this problem, we need to understand the concept of solubility and use the given information to determine the maximum amount of KNO3 that can dissolve in 300 grams of water at 40 degrees Celsius.
The given solubility of KNO3 is 60 grams per 100 grams of water at 40 degrees Celsius. This means that 100 grams of water can dissolve 60 grams of KNO3.
To find out the maximum amount of KNO3 that can dissolve in 300 grams of water, we can set up a proportion:
(solubility of KNO3 in grams)/(100 grams of water) = (maximum solubility in grams)/(300 grams of water)
Next, we can plug in the values we know into this proportion:
60 grams/100 grams = x grams/300 grams
To solve for x, we can use cross multiplication:
(60 grams)(300 grams) = (100 grams)(x grams)
18,000 grams = 100x
To isolate x, we divide both sides of the equation by 100:
18,000 grams / 100 = 100x / 100
180 grams = x
Therefore, the maximum amount of KNO3 that can dissolve in 300 grams of water at 40 degrees Celsius is 180 grams.