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(2Ai) tabulate
Observation: partially dissolve to
give colourless filtrate and black
residue
Inference: C is a mixture of
soluble and insoluble salts
(2bi) Observation: whire gelationous
ppt
Inference: Zn ^z or Al^3 likely
present
(2bii) Observation: white gelation ppt
and ppt dissolve solube
Inference: Zn ^z or Al^3 likely
present
(2biii) Obersation: Insoluble in dil. Hcl
Inference: Co3^-2, So4^2- is
present
(2ci) Observation: Residue dissolvedto
give a pale blue solution.
Inference: Cu^2 present
(2cii)
Observation: ppt dissolves to give
deep blue solution.
Inference: Cu^2
[3-] electrochemical or votaic cell.
3i-elctrolyte e.g cuso4.
3ii- glucose solution.
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3B-evaporating dish
stirrer bubsen burner
thermometer.
3c- white presoluble in NH3
ii. White pewdetry precipotate
iii.white precipitate soluble in eccessive
gaseouse NH2