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A2 Chemistry Unit 2 > Volumetric Analysis > Flashcards

Flashcards in Volumetric Analysis Deck (17)
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1

What is an oxidant

An oxidising agent
An electron acceptor

2

How do you approach a titration question

1️⃣ make water using oxygen
2️⃣ balance H’s on RHS with H+ on LHS
3️⃣ balance in terms of charge (put electrons in)
4️⃣ balance second equation by adding electrons
5️⃣ make electrons equal
6️⃣ squash equations together (electrons cancel out)

3

What is the indicator and colour change of the titration between iodine and sodium thiosulfate

Starch
First turns straw, then indicator added
End colour change is blue-black to colourless

4

What is the ratio between iodine and thiosulfate

1:2

5

Ratio between iodate (V) ions and iodine

1:3

6

Ratio between hydrogen peroxide and iodine

1:1

7

What is the ratio between iodate (V) ions and standard sodium thiosulfate

1:6

8

What is the ratio between hydrogen peroxide and standard sodium thiosulfate

1:2

9

What is the colour change when iron (II) is reacted with acidified potassium manganate (VII)

Colourless to pink

10

What is the ratio of acidified manganate (VII) and iron (II)

1:5

11

What are the two half equations when Iodine reacts with Sodium Thiosulfate

See notes

12

What is the overall ionic equation for Iodine with Sodium Thiosulfate

See notes

13

What are the two half equations for the titration of iodate(V) ions with Sodium Thiosulfate

See notes

14

What is the overall ionic equation for the titration of iodate(V) ions with Sodium Thiosulfate

See notes

15

What are the two half equations for the titration of a hydrogen peroxide with sodium thiosulfate

See notes

16

What is the overall ionic equation for the titration of hydrogen peroxide and sodium thiosulfate

See notes

17

What are the two half equations for the titration of Iron(II) with acidified manganate(VII)

See notes