Titration

Question 1

What are the units of volume?

Answer 1

dm³

Question 2

How do you convert from cm³ to dm³?

Answer 2

/ 1000

Question 3

What are concordant results? What does the titre results have to be in?

Answer 3

1dm3 within eachother

consistent reuslts

Question 4

Why is using a larger titre better?

Answer 4

easier to read

Question 5

How is sample prepared?

Answer 5

weighing boat

2dp balance

transfer to beaker

reweigh sample bottle

measure mass difference

Question 6

How is the sample dissolved?

Answer 6

add deionised watger

stir with glass rod

until all solid has dissolved

Question 7

What happens after the sample has dissolved?

Answer 7

transfer to volumetric flask

with washings

make up 250 cm3

shake

must mention volumetric flask

Question 8

What are the steps in titration for preparing the solution?

Answer 8

1. fill the burette with the acid of known concentration
2. accurately measure an amount of the alkali, using a calibrated pipette and pipette filler
   
   1. add the alkali to a conical flask and a few drops of suitable indictator

Question 9

how is the titration carried out?

Answer 9

1. run in acid from the burette until the colour just changes, showing that the solution in the conical flask is now neutral
2. repeat the procedure, adding the acid dropwise as you approach the end point, until values of the volume of acid at neutralisation are the same, within experimental error