Chemistry review. Flashcards
what is a Mixture
A mixture is a substance up of two or more substances but you can see both substances separately. The solvent did dissolve the solute.
What is a solution.
A solution is a type of mixture were one substance is dissolved into another can’t see both substances the solvent did not dissolve the solute.
What are 5 changes that means there was a chemical reaction that has occured.
change in smell, change in colour, energy change, gas bubbles and precipitate formation.
What is a controlled variable.
A controlled variable is what you kept the same in a expirment.
The difference between a chemical change and a physical change.
A chemical change is irreversible and a physical change is reversible.
what is hydrogen ions.
hydrogen ions is an acid.
What is hydroxide ions.
hydroxide ions is a base.
how does paper chromatography work.
smear the mixture on filter paper then place it in a solvent substances willl be attracted to the solvent at a different rate and allows people too see the different substances. liguis+liquid.
how does the centrefuge work.
a machine with a rapidly rotating container that applies centrefugal force to its contents. liquid+liquid.
