Chemistry 5070 · O Level · Identification of ions and gases
Identification of ions and gases — practice question
Use the compounds listed below to answer the questions.
AgCl
Ba(NO$_3$)$_2$
KI
KMnO$_4$
K$_2$SO$_3$
Mg(NO$_3$)$_2$
Na$_2$CO$_3$
Na$_3$N
NH$_4$Cl
ZnSO$_4$
Each compound can be chosen once, more than once, or not used.
State which compound:
(a)[1]
has a purple colour
(b)[1]
forms a white precipitate with aqueous sodium sulfate
(c)[1]
gives a brown solution when it reacts with aqueous chlorine
(d)[1]
is made by means of a precipitation reaction
(e)[1]
contains an anion carrying a charge of $-3$
(f)[1]
is used to test for a reducing agent.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “potassium permanganate, KMnO₄” …