Redox titrations

Question 1

What titrations

Answer 1

A common life technique used to measure the mass or concentration of a unknown substance

Question 2

What titration is a form of?

Answer 2

Volume metric analysis that involves using standard solution and a quantitive reaction

Question 3

A quantitative reaction is a method that does what?

Answer 3

Produces a number at the end and a balance equation is low

Question 4

What is redox titrations based on?

Answer 4

Redox reactions

Question 5

An oxygen agent is titrated against what?

Answer 5

I reduce an agent or vice versa

Question 6

How are electrons transformed in a redox reaction?

Answer 6

Elections are transferred from the oxidising agent to the reducing agent

Question 7

Indicators

Answer 7

Are used in redox titration as with other titration

Question 8

Potassium permanganate is what

Answer 8

Its own indicator, so therefore no indicator is needed

Question 9

Then what if Iodine is involved?

Answer 9

Starch solution can be used as an indicator

Question 10

What is the purpose of a rough titration?

Answer 10

To give a ballpark figure of the end point

Question 11

What is a standard solution

Answer 11

•A solution of accurately known solution.

•They are often prepared and used in titrations as the reactant of known concentrations.

Question 12

What are the concentrations

Answer 12

0.1
0.05
0.2
0.15
= 100cm3

Question 13

Weird concentration?

Answer 13

0.02 = 250cm3

Question 14

measuring mass

Answer 14

•Put required piece apparatus on balance and tare balance

•add required mass substances to the piece of apparatus required.

Question 15

Standard solution

Answer 15

•dissolve required substance into small volume of deionised water

•make up solution until graduation mark with de-ionised water, stopper and invert to mix evenly

•transfer solution into volumetric flask with washings

Question 16

2 pieces of accurate glassware for accurate measurement

Answer 16

Burette

Pipette

Much more accurate than measuring cylinder

Question 17

2 types of Pippetes

Answer 17

Volumetric and graduated

Question 18

Graduated pipettes

Answer 18

•Measure any whole volume up to their maximum volume

Question 19

Volumetric pippetes

Answer 19

Have no scale on the side of them and can measure the set volume they are designed for

So if made for 25cm3 they can only measure a volume of 25cm3

Question 20

Burrtte

Answer 20

Used to accurately add small volumes of substance to a reaction

•unlike pipette a burette will allow you to add decimal point volumes to a reaction as it has 0.1cm graduation marks on scale