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Live Neco Gce Expo For Chemistry Paper I (Alternative to Practical)

1i.white paper, burette, retort stand, flat bottom flask ii. Parallax error, instrumental error,personal error

1b (CA*22.5)/(0.1*25)=1/1
Ca=0.111 mol/dm3

1bii. 0.111= 4.05/rmm rmm =36.5g/mol

1ci. By mixing the pellets of 0.28g in water ii. Preparation of salts
production of fertilizer

2i. Green ppt green ppt soluble in excess fe2+ confirmed ii. Fe2+ confirmed
iii. Brown ppt
iv. White ppt 2v. Zn2+, pb2+, al3+ suspected
vi. Zn2+ confirmed
vii. White ppt - zn2+ confirmed

2b. Release of ammonia

(3ai) chromatography

(3aii) Four

(3aiii) Cottonwool

(3aiv) IV

(3bi) CuSO4

(3bii) CaO

(3ci) Silica gel and CaO

(3cii) drying agent as absorbent

(9i.)white paper, burette, retort stand, flat bottom flask
(ii) Parallax error, instrumental error,personal error

(9b) (CA×11.4)/(9.9×14)=9/9 Ca=9.999 mol/dm2.

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