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WorksheetsIdentification of Ions & Gases
Total questions: 11
Worksheet time: 55mins
Flame colour for copper ions
Blue
Red
Blue - green
Yellow
Colour of precipitate when sodium hydroxide is added to a Calcium ion solution.
White
Red - brown
Green
Blue
A few drops of sodium hydroxide solution was added to a metal salt solution.
A dark green gelatinous precipitate was formed.
Which metal ion (cation) was present in the salt solution?
iron(III) ion, Fe3+
iron(II) ion, Fe2+
copper(II) ion, Cu2+
zinc ion, Zn2+
A few drops of sodium hydroxide solution was added to a metal salt solution. A brown gelatinous (jelly-like) precipitate was formed.
Which metal ion (cation) was present in the salt solution?
copper(II) ion, Cu2+
zinc ion, Zn2+
iron(III) ion, Fe3+
iron(II) ion, Fe2+
Using solution X, a student successfully tested for the presence of chloride ions. What is solution X and the result of the test?
solution X is dilute sulphuric acid and the result is a yellow precipitate
solution X is dilute sulphuric acid and the result is a white precipitate
solution X is silver nitrate solution and the result is a yellow precipitate
solution X is silver nitrate solution and the result is a white precipitate
Which test and result show that a fertiliser contains nitrate ions?
A
B
C
D
A green halogen gas is bubbled through a potassium halide solution. The potassium halide solution turns brown–black.
What is the halogen and what is the potassium halide solution?
A
B
C
D
A reagent in solution is added to a solid sample of a fertiliser. The mixture is warmed and the gas given off changes the colour of damp litmus paper.
The test shows that the fertiliser contains ammonium ions.
What is the reagent and what is the original colour of the litmus paper used in the test?
A
B
C
D
The diagram shows a chemical reaction that produces a gas. The gas bleaches damp litmus paper.
What is the gas?
ammonia
chlorine
hydrogen
oxygen
