RP 2- titration Flashcards
1
Q
how do you work out concentration ?
A
concentration = number of moles / volume
mol/ dm^3
2
Q
how do you turn mol/ dm^3 to g/ dm^3
A
you times it by the RFM
3
Q
how do you convert cm^3 to dm^3 ?
A
you divide by 1000
4
Q
what equipment do you use to do a titration ?
A
a burret, pipette, conical flask
5
Q
how do you do a titration ?
A
- add an alkali into a conical flask
- add 5 drops of indication into the alkali
- fill burret with acid
- add acid into alkali until it is neutral
- read volume of acid
6
Q
how do you make sure the test is reliable ? (titration)
A
repeat until you have two results with in 0.1cm^3
7
Q
what indicators can you use for titration ?
A
methyl orange and phenolphthalein
8
Q
what happens to methyl orange ?
A
it goes from yellow to red
9
Q
what happens with phenolphthalein ?
A
it goes from pink to colourless
10
Q
how do you make sure you can see the colour change ?
A
swirl the solution to mix it and place on a white surface
