Cation and anion test

Question 1

how to identify carbonate ion

Answer 1

limewater turns cloudy

Question 2

how to identify sulphate ion

Answer 2

white ppt is formed with hydrochloric acid followed by Bacl2

Question 3

how to identify chloride ion

Answer 3

white ppt is formed with nitric acid followed by AgNo3

Question 4

how to identify nitrate ion

Answer 4

brown ring is formed with sulphuric acid followed by FeSO4 and sulpuric acid

Question 5

No ppt in excess NaOH

Answer 5

ammonium ion

Question 6

white ppt insoluble in excess NaOH

Answer 6

mg2+ , Ca2+

Question 7

white ppt soluble in excess NaOH

Answer 7

Zn2+ , Al3+ , Pb2+

Question 8

blue ppt insoluble
green ppt insoluble
orange ppt insoluble

Answer 8

cu2+
Fe2+
Fe3+

Question 9

what colour is Fe2+ in excess Naoh

Answer 9

green

Question 10

no ppt in excess ammonia

Answer 10

ammonium ion , Ca2+

Question 11

white ppt insoluble in excess ammonia

Answer 11

mg2+, al3+ , pb2+

Question 12

white ppl soluble in ammonia

Answer 12

Zn2+

Question 13

is cu2+ soluble in excess ammonia ?what colour

Answer 13

yes , blue

Question 14

green insoluble in excess ammonia
brown insoluble

Answer 14

fe2+
fe3+

Question 15

colour of CuCl2 and CuCo3

Answer 15

green

Question 16

colour of CuO

Answer 16

black

Question 17

colour of PbO

Answer 17

brown when hot yellow when cold

Question 18

colour of CusO4 / Cu(No3)2

Answer 18

blue

Question 19

colour of ZnO

Answer 19

yellow when hot , white when cold

Question 20

ion soluble in water

Answer 20

nitrate ion , ammonium ion , sodium and potassium

Question 21

for chloride which are insoluble salts?

Answer 21

agcl, pbcl2, hgcl2

Question 22

for sulphate which are insoluble salts?

Answer 22

BaSO4 , CaSO4 , PbSO4

Question 23

for carbonate which are soluble

Answer 23

ammonium carbonate , sodium carbonate and potassium carbonate