Salt analysis 2

Question 1

To the original solution add dil. HCl and Filter
ppt formed

Answer 1

Grp I (Pb2+) present

Question 2

To the original solution add dil. HCl and Filter
No ppt formed

Answer 2

Grp I (Pb2+) absent

Question 3

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
ppt formed

Answer 3

Grp II (Cu2+) present

Question 4

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
No ppt formed

Answer 4

Grp II (Cu2+) absent

Question 5

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
White gelatinous
Ppt.

Answer 5

Grp-III (Al+3) present

Question 6

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Brown ppt

Answer 6

Grp-III (Fe3+) present

Question 7

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
No ppt formed

Answer 7

Grp-III absent

Question 8

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Pass H2S through the above solution. Filter.
Black ppt

Answer 8

Grp-IV (Ni2+) present

Question 9

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Pass H2S through the above solution. Filter.
Flesh colour ppt

Answer 9

Grp IV (Mn2+)present

Question 10

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Pass H2S through the above solution. Filter.
Dirty white ppt

Answer 10

Grp IV (Zn2+) present

Question 11

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Pass H2S through the above solution. Filter.
No ppt

Answer 11

Grp IV absent

Question 12

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Pass H2S through the above solution. Filter.
Boil off H2S. Add NH40H and (NH4)2CO3. Filter.

A white ppt

Answer 12

Grp-V (Ba2+ ,Ca2+, Sr2+) present

Question 13

To the original solution add dil. HCl and Filter, Pass H2S through the above solution.
Boil off H2S. Add solid NH4Cl. Heat and cool. Add NH40H in excess. Filter.
Pass H2S through the above solution. Filter.
Boil off H2S. Add NH40H and (NH4)2CO3. Filter.

No ppt

Answer 13

Group V absent

Question 14

To the original solution add NH4Cl, NH4OH and disodium hydrogen phosphate. Scratch inside of test tube with the glass rod.
White crystalline ppt

Answer 14

Grp-VI (Mg2+) present