New Way Chemistry for Hong Kong A-Level Book 437 42.2 Variation in Properties of the Halogens (SB p.92) Br 2 is slightly soluble in water On diluting saturated bromine water, hydrolysis occurs Br 2 (l) + 2H 2 O(l)HBr(aq) + HOBr(aq) coloured colourless OBr – ion is also unstable and will form colourless compound when reacting with dyes which is similar to OCl – ion OBr – (aq) + dye  Br – (aq) + (dye + O)
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