4.2. Bonding and structure
A subsection of Chemistry, 9701, through 4. States of matter
Listing 10 of 122 questions
Mohr’s salt is a pale green crystalline solid which is soluble in water. It is a ‘double sulfate’ which contains two cations, one of which is Fe2+. The identity of the second cation was determined by heating solid Mohr’s salt with solid sodium hydroxide and a colourless gas was evolved. The gas readily dissolved in water giving an alkaline solution. A grey-green solid residue was also formed which was insoluble in water. What are the identities of the gas and the solid residue?
9701_s09_qp_1
MCQ
2009
Paper 1, Variant 0
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Questions Discovered
122