Salt 3 and 4

Salt 3

S.No	Experiment	Observation	Inference
1.	Physical Examination : a) Colour of the given salt is noted. b)Odour of the salt is noted	white no specific colour	Li 2+, Ni2+,Fe3+,Mn2+, Cu2+ absent NH4+, S2-, CH3COO- absent
2.	Dry Heating Test: A small amount of salt taken is heated.On heating , some salts undergo decompositon, thus evolving gas and may undergo characteristic change a) Gas evolved b) Formation of sublimate c) Decrepitation d) Swelling	No gas evolved No characteristic sublimate formed No decrepitation No swelling	CO32-,NO3- absent NH4+,I- absent Pb(NO3) absent PO43- absent
3.	A filter paper is soaked into the solution of the salt, core nitrate and MNO3 and burnt	Green residue is formed	ZN2 + may be present
4.	Flame test: Salt is made into paste with conc. HCL on a clean watch glass and introduced in a blue flame with the help of glass rod.	green flame seen with naked eye	ZN2 + may be present
5.	Dilute H2 SO4 acid test Small quantity of salt is taken in a test tube and add one to 2ML of dilute H2 SO4	No characteristic gas is evolved	CO3- ,NO3- ,SO32 -, S2 - absent
6.	Sodium carbonate extract: A pinch of salt is mixed with the double of NA2CO3 in a test tube and is labelled and boiled with 10 to 15 ML of distilled water. For sometime the suspension obtained is filtered.
7.	Confirmatory test for sulphate: a)Bacl test: Add dilute HCL and capital Bacl Is added to aq. solution of salt	White precipitate	Sulphate formed
8.	Preparation of original solution: Two small quantity of a given salt add some distilled water shake the contents. The salt is dissolved. Thus, clear solution is obtained and labelled OS.
9.	Group Separation: a) Group 0 :the solid salt is heated with concentrated NAOH solution b) Group 1:Dilute HCL is added to OS c) Group 2: To dilute HCL and original solution Add (NH4)2SO4 d) Group 3: To OS add NH4CL and NH4OH e) Group 4:To ammonium chloride ammonium hydroxide and yellow ammonium sulphate	no characteristic ammonia smell No PPT No black PPT No PPT White precipitate	NH4+ Absent Pb Group absent. Group 2 absent Group 3 absent
10.	Confirmatory test: Dissolve white precipitate in HCL a) To one part of solution at K4[Fe(CN)6] b) to another part of solution add sodium hydroxide	Blue white precipitate white precipitate( soluble in excess)	Zn 2+ confirmed Zn2+ , confirmed
	Result:
	The acidic radical of a given simple salt is sulphate [SO42-]
	The basic radical over given simple salt is zinc[Zn2+]
	The given simple salt is zinc sulphate, ZNSO4

Salt 4

S.No	Experiment	Observation	Inference