BMAT Chemistry Chemical Tests Questions and Answers

hydrogen burning splint- squeaky pop oxygen relights glowing splint CO2 turns limewater cloudy when shaken chlorine turns damp blue litmus paper red, then bleached carbonate ions dilute acid and produces CO2 halide ions aq silver nitrate in dilute nitric acid results of halide tests iodides- yellow precipitate, bromides- cream precipitate, chlorides- white precipitate sulfate ions aq barium chloride in dilute hydrochloric acid Al3+, Ca2+, Mg2+ aq NaOH- form white precipitate Cu2+ aq NaOH- forms blue precipitate Fe2+ aq NaOH- forms green precipitate Fe3+ aq NaOH- forms brown precipitate lithium flame test crimson red sodium flame test yellow-orange potassium flame test lilac calcium flame test red-orange copper flame test green water anhydrous copper sulfate- colour change from white to blue