Edexcel Jan 2012 Paper 3 Q2

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PMT 2 A series of tests was carried out on a compound, B, which is known to contain either carbonate or sulfate (sulfate(VI)) ions as well as one cation. Complete the inferences column. You may use names or formulae in your answers. Test (a) Carry out a flame test on B. (b) Add aqueous barium chloride solution to an aqueous solution of B. (c) Add dilute hydrochloric acid to the mixture formed in (b) until there is no further change. Observations Yellow flame. Inferences The cation in B is A white precipitate forms.The precipitate could be eitherorSome fizzing occurs and the precipitate dissolves. The anion in B isand the fizzing is due to formation of(1) (2) (2) (d) The formula of B is (1)(Total for Question 2 = 6 marks) *P39305A0416*<br /> PMT BLANK PAGE *P39305A0516* Turn over<br />

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