Chemistry~ solutions Flashcards
Study for chem test
What is distillation used for?
Separating liquids from solutions and ones with different boiling points.
Evaporation…?
Separating components of a mixture (dissolved solid from a mixture)
Filtration…?
Separate an insoluable solid from a liquid
Solvent
Dissolves other substances
Mixture
Two or more substances that are not chemically joined together
Solute
Dissolves INTO other substances
2 ways to make something dissolve faster
Stirring or heating.
Name the method you would use to separate water from
a saturated mixture of sugar and water and why?
Evaporation as it is a mixture of to substances that are not dissolved.
Name the method you would use to separate propanone
from a mixture of propanone and ethanol (two miscible
liquids)?
Distillation
Name the method you would use to separate potassium
bromide from a mixture of potassium bromide and
water?
Evaporation.
Name the method you would use to separate
cyclohexane from a mixture of cyclohexane and water
(two miscible liquids)?
Distillation.
Crystallisation…?
Separating solids from a solution.
What is a solution?
Substance composed of a solute and a solvent.
What is a chemical change?
involves the creation of at least one new chemical substance (so, the individual particles are now different).
Meaning of dilute
To add water to a substance.
What is collected on filter paper when the process is over?
Residue.
What is a physical change?
When particles rearrange but do not individually change.
Miscible…?
Two liquids that are able to mix together..
Immiscible…?
Liquids that do not mix and are therefore easier to separate.
Chemical changes are typically…?
Irreversible.
Physical changes are…?
Reversible.
What makes a concentrated solution?
More solute
What makes a saturated solution.
The maximum amount of solute.
How many phases of chromatography are there and what are they?
2 phases in chromatography, stationary and mobile phase.
