Chemistry · May / June 2020 · Paper 62 · Question 3
0620
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Two solids, solid L and solid M, were analysed. Solid L was chromium(III) chloride. Tests were done on each solid. tests on solid L Complete the expected observations. Solid L was dissolved in distilled water to produce solution L. Solution L was divided into four portions in three test-tubes and a boiling tube.i
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3(a)[1]
stays purple or no change
3(b)[2]
green ppt
(dissolves / soluble) producing a green solution
3(c)[2]
grey-green precipitate
remains in excess / does not dissolve
3(d)[1]
white precipitate
Tests on solid M
3(e)[2]
sodium / Na+
carbonate / CO32–
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