Solubility

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

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 

At 60 degrees Celsisu, 72g of NH4CL is dissolved in 100g of water, this solution is said to be:

• saturated
• unsaturated
• supersaturated
• stable

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

Which salt is LEAST soluble at 0 ºC?

• K₂Cr₂O₇
• KNO₃
•  KClO₃
• Ce₂(SO₄)₃

Solution where more solute can still be dissolved at the given temperature. 

• Saturated
• Unsaturated
• Supersaturated
• Homogeneous solution

How many moles of Na₂SO₄ is needed to make 2.5 L of 2.0 M solution?

• 5 moles
• 1 moles
• 1.25 moles
• 0.80 moles

Describe a solute.

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