Combustion, Corrosion and Precipitation Reactions

Combustion, Corrosion and Precipitation Reactions

Year 10

​What we will learn about

• Review of types of reactions

• Combustion reactions

• ​Corrosion reactions

• ​Solutions and solubility

• ​Precipitation Reactions

• ​Predicting the precipitate

​Combustion Reactions

• ​a fuel reacts with oxygen and releases heat

• ​this fuel can be a number of things, we often see a hydrocarbon

• ​also known as 'burning'

• ​complete or incomplete

• ​general form = fuel + oxygen --> carbon dioxide + water

• ​just have to balance!

​Metal + Oxygen

• ​Will always give us a metal oxide

• ​then just have to balance it

• ​also known as corrosion (sometimes!)

​Corrosion Reactions

• ​a specific metal oxide reaction

• ​when a metal is exposed to oxygen and/or water

• ​changes the metal into a more stable form, with a protective 'layer' on top to prevent more exposure to the air

Multiple Choice

Propane is burned with a blue flame

• propane + oxygen --> carbon dioxide + water

• propane + carbon dioxide --> oxygen + water

• propane + oxygen --> carbon monoxide + water

Multiple Select

Hydrocarbon fuel + oxygen ----> ___+____

(Select 2)

• CO₂

• O₂

• H₂O

• C_xH_y

Multiple Choice

Write a Balanced Equation for this reaction: C₂H₄ + 2 O₂ -->

• C₂O₂ + H₄

• CO₂ + HOH

• CO + H

• 2 CO₂ + 2H₂O

​Solutions and Solubility

• ​solutions are where a solute is dissolved in a solvent

• ​soluble = are able to be dissolved

• ​insoluble = unable to be dissolved

​

​

​Precipitation reactions are where two solutions are mixed together, and form an insoluble solid

​Precipitation Reactions

​Often double displacement reaction

​

• ​aqueous solution + aqueous solution --> aqueous solution + insoluble solid

• ​all you have to do is swap around the reactants to make the products, taking note of the charge

• ​AB + CD --> AD + CB

​Determining the Precipitate

• ​Precipitate = the insoluble solid

• ​USE YOUR DATA SHEET!!!!!!

Multiple Choice

In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?

• (s)

• (g)

• (l)

• (w)

Multiple Choice

Which of the following is insoluble in water?

• Barium Sulfate

• Strontium Sulfate

• Silver Sulfate

• Sodium Sulfate

Multiple Choice

Which of the following is soluble in water?

• Magnesium hydroxide

• Beryllium hydroxide

• Potassium hydroxide

• Zinc hydroxide