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

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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

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(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.