Tests for inorganic + organic substances

Question 1

Group 1 Salts

Answer 1

Soluble

Question 2

Ammonium salts

Answer 2

Soluble

Question 3

Nitrates

Answer 3

Soluble

Question 4

Acetates

Answer 4

Soluble

Question 5

Chlorides

Answer 5

Soluble except Ag, Pb

Question 6

Bromides

Answer 6

Soluble except Ag, Pb

Question 7

Iodides

Answer 7

Soluble except Ag, Pb

Question 8

Sulfates

Answer 8

Soluble except Ba, Pb, Ag (slightly), Ca (slightly)

Question 9

Hydroxides

Answer 9

Insoluble except Group 1 and Group 2 below Mg

Question 10

Carbonates

Answer 10

Insoluble except Group 1 and Ammonium

Question 11

Testing for carboxylic acid

Answer 11

Add Na2CO3, if bubbles, then it is the acid

Question 12

Testing for alkene

Answer 12

Add Br water, if it decolourises from brown it is an alkene

Question 13

Testing for alcohol (2 tests including distinguishing types)

Answer 13

Add ceric ammonium nitrate, if it changes colour from yellow to red it is an alcohol/Add sodium and if it bubbles H2 it is an alcohol
To test types, oxidise and if carboxylic acid it is 1, if ketone it is 2, if NVR it is 3

Question 14

Yellow-green/apple green flame test

Answer 14

Barium

Question 15

Orange-red/brick red flame test

Answer 15

Calcium

Question 16

How to test between Ag+ and Pb2+

Answer 16

Add dilute NH3; Ag+ produces a brown ppt, Pb2+ produces a white ppt

Question 17

How to test between Mg2+, Cu2+, Fe2+, Fe3+

Answer 17

Add dilute NH3; Mg2+ produces a white ppt, Cu2+ produces a blue ppt; Fe2+ produces a green ppt; Fe3+ produces a brown ppt