Titration

Question 1

what equation allows us to convert from moles to grams and vice versa ?

Answer 1

atomic mass = grams/moles

Question 2

What equation links moles with concertation?

Answer 2

concertation = moles/ volume

Question 3

what unit of volume should be used as standard when using c=n/v equation?

Answer 3

dm3

Question 4

how do we convert cm3 to dm3?

Answer 4

/1000

Question 5

what values from the periodic table are added together to calculate molar mass of a substance?

Answer 5

relative atomic mass

Question 6

how many decimal places should molar mass be given to?

Answer 6

1dp

Question 7

what is meant by an ‘initial reading’ on a burette?

Answer 7

The starting volume

Question 8

what is meant ‘final reading’ on a burette?

Answer 8

The volume when the endpoint is reach

Question 9

what is meant by the term titre

Answer 9

the volume used in the burette

Question 10

what piece of equipment accurately measures the volume placed in the conical flask

Answer 10

25cm3 one mark pipette

Question 11

what piece of equipment is used to fill the burette

Answer 11

funnel

Question 12

what piece of equipment holds the solution placed under the burette

Answer 12

conical flask

Question 13

How do we select indicators

Answer 13

the indicator should have the ph range within the range of the rapid change equal to the point of titration

Question 14

what is the purpose of trial/rough titration

Answer 14

to get an idea of the titre needed so that we can slowly the flow rate when it is closering to the endpoint

Question 15

a colour change should be noticed after the addition of one extra ….

Answer 15

drop

Question 16

the indicator changing colour represents what stage of the titration

Answer 16

endpoint

Question 17

all titration readings should be to how many decimal places

Answer 17

2dp

Question 18

all titration reading should end In a … or a …

Answer 18

5 or a 0

Question 19

what is meant by the phrase concordant result

Answer 19

reading within 0.1cm3 of each other

Question 20

how do we calculate the titre mean

Answer 20

add all result together the divide by how many results where collected

Question 21

how can we calculate concentration in g dm3 from mol dm3

Answer 21

conc. mol dm3 X molar mas

Question 22

what reading do we never in mean titre calculations

Answer 22

trial/rough

Question 23

how many dps should the mean titre be given to

Answer 23

2 dp

Question 24

Does the mean titre end in a 0 or a 5?

Answer 24

No

Question 25

Which volume would be used to calculate unknown concentration? Initial reading, trial titre, titration 1 titre, average titre?

Answer 25

Average

Question 26

Which indicator is used in a titration with a strong acid and strong base?

Answer 26

Bromothymol blue

Question 27

Which indicator is used for a weak acid and strong base?

Answer 27

Phenolphthalein

Question 28

Which indicator is used for strong acid and weak base?

Answer 28

Methyl Orange

Question 29

What type of acid/base is sodium hydroxide?

Answer 29

Strong base

Question 30

What type of acid/base is hydrochloric acid?

Answer 30

Strong acid

Question 31

What type of acid/base is ethanoic acid?

Answer 31

Weak acid

Question 32

What type of acid/base is sodium carbonate?

Answer 32

Weak base

Question 33

What piece of glassware is used to make up a star dark solution?

Answer 33

Volumetric flask 100cm3

Question 34

What shape of the volumetric flask makes it accurate?

Answer 34

Narrow neck make volume changes very easily detectable

Question 35

What is used to measure out grams of a substance when preparing a solution with accurate concentration?

Answer 35

2 decimal place balance