Question

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.

Answer 1

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.

Answer 2

1) NaNO3
2) KNO3 
3) 43g
4) 40g
5) Super saturated.


~Evie