Solubility: Graphs and Rules

A beaker containing 80 grams of lead(II) nitrate, Pb(NO₃)₂, in 100 grams of water has a temperature of 30 ºC. Approximately how many grams of the salt are undissolved, on the bottom of the beaker?

• 20 grams
• 80 grams
• 66 grams
• 14 grams

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

How many grams of sodium nitrate, NaNO₃, are soluble in 100 g of water at 10 ºC?

• 80 grams
• 100 grams
• 40 grams
• 10 grams

When 50 grams of potassium chloride, KCl, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:

• supersaturated
• unsaturated
• saturated

At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K₂Cr₂O₇?

• 60 ºC
• 30 ºC
• 50 ºC
• 83 ºC

Tags

NGSS.HS-PS3-4

When 20 grams of potassium chlorate, KClO₃, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

• supersaturated
• saturated
• unsaturated

Which of these salts decreases in solubility as the temperature increases.

• Ce₂(SO₄)₃
• KClO₃
•  K₂Cr₂O₇
• KNO₃

A solution of potassium chlorate, KClO₃, has 20 grams of the salt dissolved in 100 grams of water at 70 ºC. Approximately how many more grams of the salt can be added to the solution before reaching the saturation point?

• 10 grams
• 30 grams
• 80 grams
• 60 grams 

How does a solution become supersaturated?

• dissolve lots of solvent in it.
• dissolve a little solute in it. 
• dissolve more solute than you should be able to. 
• dissolve a super amount of solvent in it. 

Describe a solute.

• part of solution present in largest amount
• gets dissolved
• water
• surrounds and breaks apart

At what temperature can you fully dissolve 140g of NaNO₃?

• 62

• 73

• 81

• You cannot determine this