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WorksheetsIDENTIFICATION OF IONS AND GASES
Total questions: 42
Worksheet time: 4hrs 30mins
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
Colour of precipitate when sodium hydroxide is added to a copper(II) ion solution.
White
Red - brown
Green
Blue
Colour of precipitate when sodium hydroxide is added to a iron(II) ion solution.
White
Red - brown
Green
Blue
Colour of precipitate when sodium hydroxide is added to a iron(III) ion solution.
White
Red - brown
Green
Blue
Test for sulphate ions is....
Add acid
Add barium chloride
Add silver nitrate
Add barium nitrate
What am I?
Barium nitrate gave a white precipitate
Flame colour was yellow
barium sulphate
lithium bromide
aluminium sulphate
Sodium sulphate
calcium bromide
Test for oxygen
Squeaky pop test
Glowing splint relights
Flame test
Breath it in
Bubble gas through limewater and turns cloudy
Test for hydrogen
Squeaky pop test
Blown out splint relights
Flame test
Breath it in
Bubble gas through limewater and turns cloudy
Test for carbon dioxide
Squeaky pop test
Blown out splint relights
Flame test
breath it in
Bubble gas through limewater and turns cloudy
What am I?
Sliver nitrate gave a yellow precipitate
Sodium hydroxide gave a brown precipitate
Iron(III) iodide
Iron(II) iodide
Iron(III) Sulphate
Iron(II) Sulphate
Sodium iron(II)
The formula of the brown precipitate made when sodium hydroxide is added is to a solution is...
Fe(OH)3 (s)
Fe(OH)2 (s)
Cu(OH)2
Al(OH)3
Test & result for carbonate ions is....
Add hydrochloric acid and fizzes
Add barium chloride, white ppt
Add silver nitrate, yellow ppt
Flame test, orange
Add sulphuric acid and see hydrogen
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+
Colourless crystals of substance X were dissolved in water and a few drops of dilute nitric acid, followed by a few drops of silver nitrate solution were added. A white precipitate formed. A few crystals of X were mixed with a few drops of concentrated hydrochloric acid. When a platinum wire was dipped in this mixture, and then placed in a roaring bunsen flame, a red flame colour was seen. From these observations deduce the identity of substance X.
copper(II) chloride, CuCl2
potassium sulphate, K2SO4
sodium sulfate, Na2SO4
calcium chloride, CaCl2
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 solution is tested by adding acidified silver nitrate solution. Which ion causes the white precipitate to form?
chloride ions, Cl−
copper ions, Cu2+
hydroxide ions, OH−
sodium ions, Na+
Which statements about a positive test for a nitrate ion are correct?
1 Aluminium is used.
2 The nitrate ion is reduced to ammonia.
3 Ammonia turns damp litmus paper red.
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
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
To test for aluminium ions, dissolved salt is reacted with ________________. If ____________ precipitate is formed, aluminium is present.
NaOH solution, white
KOH solution, yellow
HCl solution, white
CO2 gas, yellow
If iron salt is reacted with ___________________ and red-brown precipitate is formed, then it is obvious that salt contained _________ ions.
NaOH solution, Fe2+
NaOH solution, Fe3+
HCl solution, chloride
HCl solution, hydrogen
Presence of copper ions in compound can be confirmed by reacting solutions of copper salts with ______________ where ______ gelatinous precipitate will be formed.
NaOH solution, green
NaOH solution, blue
HCl solution, red
HCl solution, orange
To distinguish between zinc and aluminium salts, ______________ is used, where ________________ will re-dissolve in excess _______________.
NaOH solution, ZnO, HCl solution
NH3 solution, Zn(OH)2, NH3 solution
HCl solution, ZnO, HCl solution
NH3 solution, Al(OH)3, NH3 solution
Damp blue litmus paper turning red, then bleaching white, is a positive test for which gas?
hydrogen
oxygen
carbon dioxide
ammonia
chlorine
Damp red litmus paper turning blue is a positive test for which gas?
hydrogen
oxygen
carbon dioxide
ammonia
chlorine
The diagram shows litmus paper testing the gas that is given off from the contents of the test tube.
The damp litmus paper
turns blue.
turns colourless.
turns red.
turns red and is then bleached white.
The diagram shows a chemical reaction that produces a gas. The gas bleaches damp litmus paper.
What is the gas?
ammonia
chlorine
hydrogen
oxygen
