Saturation

What is the temperature at which a solution containing 75g of Pb(NO3 )2 is saturated?

• 40 degrees C

• 50 degrees C

• 30 degrees C

• 20 degrees C

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What is the amount of NaNO3 can dissolve at 10°C to make a saturated solution?

• 70 g

• 80 g

• 60 g

• 90 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the chemicals listed in the graph show a decrease in solubility as temperature increases?

• Ce2 (SO4 )3

• NaNO3

• KNO3

• Pb(NO3)2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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 

To dissolve more material in a saturated solution:

• Add water or boil it

• Shake or stir faster

• Evaporate it

• You can only add water. Boiling it won't help.

When a solvent contains as much of a solute as it can hold, it is described as being

• saturated

• unsaturated

• supersaturated

• dilute

Answer explanation

A solution is described as saturated when it contains the maximum amount of solute that can be dissolved in the solvent at a given temperature and pressure. In this case, the solvent cannot hold any more solute, and any additional solute added will not dissolve. Therefore, the correct term for a solvent containing as much solute as it can hold is 'saturated'.

How does a solution become supersaturated?

• dissolve lots of solute in it.

• dissolve a little solute in it. 

• dissolve more solute than you should be able to. 

• dissolve a solvent in it. 

When a solution is saturated:

• No additional solute will dissolve into it at its current temperature and pressure.

• More solute can be dissolved into it at its current temperature and pressure.

• You can increase its concentration by just adding more solute.

• It becomes solid and starts melting.

Answer explanation

A saturated solution is one in which no more solute can be dissolved at its current temperature and pressure. This means that the solution has reached its maximum concentration, and adding more solute will not increase its concentration. Therefore, the correct choice is that no additional solute will dissolve into it at its current temperature and pressure.

What happens to the solubility of a gas in a liquid when the solution is saturated and the temperature is increased?

• A) Solubility increases

• B) Solubility decreases

• C) Solubility remains the same

• D) Solubility becomes zero

Which of the following best describes a saturated solution?

• A) A solution that can dissolve more solute at a given temperature

• B) A solution that has dissolved all the solute it can at a given temperature

• C) A solution that has no solute

• D) A solution that is boiling