Solubility

At 30'C, which substance has the lowest solubility?

• KNO3

• KBr

• NaCl

• Yb2(SO4)3

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:

• saturated

• unsaturated

• concentrated

• warm

When a solution is saturated:

• No additional material will dissolve in it
• You need to stir it more 
• Two materials have combined to create a clear liquid
• Crystals form 

Using the solubility curve decide whether 50g of NaCl dissolved in 100 of water at 60°C is unsaturated, saturated or supersaturated.

• saturated

• unsaturated

• supersaturated

Using the solubility curve, decide whether 20g of KClO₃ dissovled in 100g of water at 50°C is saturated, unsaturated or supersaturated.

• saturated

• unsaturated

• supersaturated

You have 30g of NH₄Cl, how many more grams of NH₄Cl would have to be added to 100g of water at 45°C to have a saturated solution?

• 10g

• 20g

• 25g

• 15g

Decide whether 50g of KCl dissolved in 100g of water at 50°C is saturated, unsaturated or supersaturated.

• saturated

• supersaturated

• unsaturated

Suppose you have a saturated NaCl solution containing a certain amount of solute in 100g of water, which is then cooled from 100°C to 0°C, how much solid will come out of solution?

• 2g

• 10g

• 38g

• 15g

Tags

NGSS.HS-PS1-5

At what temperature can you fully dissolve 60g of KNO₃?

• 27

• 30

• 37

• You cannot determine this

What type of a solution is 55g KCl at 70ºC in 100g H₂O?

• Saturated

• Unsaturated

• Supersaturated