Which point represents the most concentrated solution of salt x

Asked by admin @ in Physics viewed by 272 People

Solubility Curve Help? 5 Questions.

1.Which solute is the most soluble at 30DegreesC?
Question 1 options:
NaCl
NH3
NaNO3
KNO3
2.Which solute is the most soluble at 70C?
Question 2 options:
NaCl
NH3
NaNO3
KNO3
3.At what temperature do NH4Cl and Na2SO4 have the same solubility?
Question 3 options:
380C
400C
430C
450C
4.How many grams of KNO3 will dissolve in 100 g of water at 30C?
Question 4 options:
38 grams
40 grams
42 grams
44 grams
5.60 grams of KNO3 is dissolved in water. The temperature of the water is 30DegreesC. Using the graph, determine if this solution is…
Question 5 options:
Unsaturated
Saturated
Supersaturated
Cannot be determined
Graph in pics.

Answered by admin @



See the first 4 situations marked on the attached graph.
___________________________________

In #4, we ( I ) discovered that at 30°C, 40-something grams of KNO₃
can dissolve in 100 grams of water.

Then, #5 says that 60 grams of KNO₃ are dissolved in water
at that temp, but it doesn't say how much water !

-- If it's 2 drops of water, then it's way supersaturated.

-- If it's an olympic-size swimming pool, then it's unsaturated.

We can't tell, because we don't know how much water.


















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