Redox Titration

Question 1

What is the 1st step of titration?

Answer 1

If the sample is a solid, it is weighed using an accurate balance, and then dissolved to make up a known volume of solution.

Question 2

What is the 2nd step of titration?

Answer 2

Step two:
A pipette is used to measure accurately a volume of this solution. A safety pipette filler is used to draw solution into the pipette. This is emptied into a conical flask.

Question 3

What is the 3rd step of titration?

Answer 3

Step three
A few drops of an indicator may be added to the conical flask. This will show a change of colour when the titration is complete. Though in some reactions, the reaction can self indicate.

Question 4

What is the 4th step of titration?

Answer 4

Step four
A second chemical is placed in a burette. This other solution is of a chemical that will react with the synthesised chemical sample in the conical flask.

Question 5

What is step 5 of a titration?

Answer 5

Step five
The solution from the burette is run into the conical flask. The solution is added one drop at a time, with swirling to mix the solutions as the end-point is approached. Eventually, a colour change shows that the correct amount has been added to react completely with the synthesised chemical in the sample. For example, the pink permanent colour is there

Question 6

What is step 6 of a titration?

Answer 6

Step six
The volume of solution added from the burette is noted. The titration is repeated until concordant results (within 0·2 cm3 of each other) are obtained. The titration results can then be used to calculate the amount of the synthesised chemical in the sample, and therefore find its purity.