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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)

 

Oxidation

Metal → Metal Ion + Electron/s

E.g. Cu(s) → Cu2+(aq) + 2e– 

 

Reduction

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)

 

E.g. OPTION 2

NOTE: BOTH THE CONSERVATION OF MASS AND CHARGE MUST BE SHOWN IN YOUR EQUATION!

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)

 

Photosynthesis

Carbon Dioxide Gas + Liquid Water → Solid Glucose + Oxygen Gas

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

 

Respiration

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.

 

© Matrix Education and www.matrix.edu.au, 2018. Unauthorised use and/or duplication of this material without express and written permission from this site’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Matrix Education and www.matrix.edu.au with appropriate and specific direction to the original content.

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