Chemistry 5070/22 — October/November 2021
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
Topics Stoichiometry · Chemical Reactions · Atoms, Elements and Compounds · Experimental Techniques and Chemical Analysis · Acids, Bases and Salts · Organic Chemistry · +5 more
Choose from the following chlorides to answer the questions.
aluminium chloride
ammonium chloride
cobalt(II) chloride
hydrogen chloride
iron(III) chloride
potassium chloride
silver chloride
sodium chloride
Each chloride may be used once, more than once or not at all.
State which chloride:
contains a cation with a charge of 2+
______
reacts with aqueous sodium hydroxide to form a red-brown precipitate
______
is insoluble in water
______
reacts with sodium hydroxide when warmed to produce a gas which turns damp red litmus paper blue
______
when added to water can form an aqueous solution with a pH of 1.
______
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