A-level Chemistry Mark scheme Paper 3 June 2018 - Exam QA

MARK SCHEME – A-LEVEL CHEMISTRY – 7405/3 – JUNE 2018 6 the Ag(NH 3) 2 + ion when the reagent should be Tollens’ reagent (or ammoniacal silver nitrate). In this example, no credit is given for the ion, but credit could be given for a correct observation following on from the use of the ion. Specific details will be given in mark schemes. ................
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