Chemical Reactions Year 11 Chemistry Students Must Know

A helpful list of essential chemical reactions that a Year 11 student should know.

Chemical Reactions in Year 11

Metals in Water

Reactive Metal + Liquid Water → Metal Hydroxide + Hydrogen Gas

E.g. Na(s) + H2O(l) → NaOH(aq) + H2(g)

Metal + Steam → Metal Oxide + Hydrogen Gas

E.g. Zn(s) + H2O(g) → ZnO(s) + H2(g)


Combustion of a Metal

Metal + Oxygen Gas → Metal Oxide

E.g. 2Mg(s) + O2(g) → MgO(s)


Combustion of a Carbon Compound

Hydrocarbon + Oxygen → Carbon Dioxide Gas + Liquid Water

E.g. 2C8H18(l) + 25O2(g) → 16CO2(g) + 18H2O(l)


Metals with Acids

Metal + Acid → Salt + Hydrogen gas

E.G. Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)


Carbonates with Acids

Carbonate + Acid → Salt + Carbon Dioxide Gas + Liquid Water

E.g. Na2CO3(aq) + 2HCl(aq) → 2NaCl(aq) + CO2(g) + H2O(l)



Metal → Metal Ion + Electron/s

E.g. Cu(s) → Cu2+(aq) + 2e 



Metal Ion + Electron/s → Metal

E.g. Ag+(aq) + e  Ag(s)


Redox (Reduction-Oxidation Reactions)

This reaction involves the transfer of electron/s from one reactant to another. This thus results in both a reduction and oxidation reaction occurring. To obtain the redox reaction, you can either write the net ionic equation for a displacement reaction (option 1) or add reduction and oxidation reactions together (option 2).

E.g. OPTION 1:

Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag(s)

Cu(s) + 2Ag+(aq) + 2NO3  → Cu2+(aq) + 2NO3 + 2Ag(s)

Cu(s) + 2Ag+(aq) + 2NO3 → Cu2+(aq) + 2NO3 + 2Ag(s)

Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)




Cu(s) → Cu2+(aq) + 2e


2Ag+(aq) + 2e → 2Ag(s)


Cu(s) + 2Ag+(aq) + 2e → Cu2+(aq) + 2e + 2Ag(s)

Cu(s) + 2Ag+(aq) + 2e → Cu2+(aq) + 2e + 2Ag(s)

Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)



Carbon Dioxide Gas + Liquid Water  Solid Glucose + Oxygen Gas

I.e. 6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g)



Aqueous Glucose + Oxygen Gas  Carbon Dioxide Gas + Liquid Water

I.e. C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l)


Lime Water Test (Lime Water and Carbon Dioxide)

Calcium hydroxide + Gaseous carbon dioxide  Solid calcium carbonate + liquid water

I.e. Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

Find out more about the Matrix Year 11 Chemistry Course or Matrix Year 12 Chemistry Course. Matrix courses are available for HSC English, Maths, Physics, Biology and Chemistry.



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Written by DJ Kim

DJ is the founder of Matrix Education and has over 20 years of HSC Physics teaching experience. He is the co-author of the Matrix Science program, course materials and assessments. He is also renowned for his ATAR & Scaling seminars and development of the first ATAR Calculator.


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