Solutions Flashcards
What is solute?
The thing being dissolved
What is solvent?
The thing doing the dissolving
What is a solution?
A homogeneous mixture
What does it mean if a solution is saturated?
It has dissolved the maximum amount of solute it can at that temperature
What does it mean if a solution is unsaturated?
It can dissolve more solute at that temperature
What does it mean if a solution is supersaturated?
It has dissolved more than it should have at that temperature, leaving it unstable and likely to form crystals
At what temperature can you dissolve 300g of sugar in 150g of water?
About 20ºC
At 50ºC, about how much sugar can you dissolve to make a saturated solution in 150g of water?
About 390g of sugar
How much sugar should come out of solution if you made a saturated solution at 80ºC and then cooled it to 35ºC in 150g of water?
About 202g of sugar should crystallize
If you have dissolved 200g of sugar at 50ºC in 100g of water, is your solution saturated, unsaturated, or supersaturated? (150g of water for HC)
Unsaturated (supersaturated for HC)
If you have dissolved 350g of sugar at 78ºC in 100g of water, is your solution saturated, unsaturated, or supersaturated? (70g of water for HC)
Saturated (unsaturated for HC)
If you have dissolved 400g of sugar at 64ºC in 100g of water, is your solution saturated, unsaturated, or supersaturated? (75g of water for HC)
Supersaturated (saturated for HC)
Describe three methods for dissolving more solid solute in a solvent:
- Stirring/shaking
- High temperatures
- Increase the surface area
Describe three methods for dissolving more gas in a solvent:
- No shaking/stirring
- Cold temperatures
- High pressure
How can you increase the surface area of a solid?
Break it apart into smaller and smaller pieces
