Chemistry · May / June 2022 · Paper 62 · Question 3
0620
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Solid M and solid N were analysed. Solid M was iron(III) nitrate. Tests were done on each substance. tests on solid M Complete the expected observations. Solid M was dissolved in water to form solution M. Solution M was divided into two approximately equal portions in two test-tubes.i
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3(a)[2]
brown precipitate or red-brown precipitate
remains / does not (re)dissolve (in excess)
3(b)(i)[1]
(red) litmus turns blue
3(b)(ii)[1]
ammonia / NH3
3(c)[1]
no change / no precipitate / no reaction
3(d)[1]
sulfur dioxide / SO2
3(e)[2]
lithium sulfite / Li2SO3
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