Chem Note (è?±ç??æ??è?² A[1].Fung) HKCEE 常

Chem Note (è?±ç??æ??è?² A[1].Fung) HKCEE 常 - T...

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T A. Fung Tel: 23050505 www.fungsir.net Chem. test p.1 ¸å ©¾ª* (Tests for common chemical species) 1. CO can turn citrated blood from blood red to cherry pink. @ [ ²E 7@ 2. CO 2 can turn lime water from colorless to milky. X5 “½ª* ðØ · ª * CO 2 + Ca(OH) 2 CaCO 3 + H 2 O 3. H 2 O can turn anhydrous copper (II) sulphate solid from white to blue. (II) < 5 H 2 O (l) + CuSO 4 (s) CuSO 4 ¸ 5 H 2 O (s) or H 2 O can turn dry cobalt (II) chloride paper form blue to pale pink. (II) èôø 4. SO 2 which is a colorless gas can turn bromine from brown to colorless. á5ñ/‰+ SO 2 + 2 H 2 O + Br 2 SO 4 2 + 2 Br + 4 H + or SO 2 can turn acidified potassium permanganate solution from purple to colorless. X5 “½ ª* ðØ · ª* 5 SO 2 + 2 MnO 4 + 2 H 2 O 5 SO 4 2 + 2 Mn 2+ + 4 H + or SO 2 can turn acidified potassium dichromate solution from orange to green. á5ñ /‰+ 3 SO 2 + Cr 2 O 7 2 + 2 H + 3 SO 4 2 + 2 Cr 3+ + H 2 O 5. Sulphite SO 3 2 can turn bromine water from brown to colorless. X5
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This note was uploaded on 09/02/2011 for the course CHINESE 12 taught by Professor Cn during the Spring '11 term at CNUAS.

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Chem Note (è?±ç??æ??è?² A[1].Fung) HKCEE 常 - T...

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