All about chemical equation

All About Chemical Equation

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• Legenda: Don't fall in the same thought as him!
• Throughout this lesson, I will be helping you to get better and be more confident with chemical equations.
• The topics I will be covering are;
• Understanding Ion Charges,
• Predicting chemical products and,
• Balancing equations

Understanding ion charges

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• Legenda: To view image in enlarged form, right click and then click "Open image in new tab"
• http://www.jdenuno.com/PDFfiles/IonCharges.pdf (Incorporar)
• Legenda: Chart of common ions

Predicting chemical products

• There are 3 types of reaction
• Combustion
• Single displacement
• Double displacement

Combustion

• What is a combustion reaction?
• Occur when hydrocarbon is reacted with oxygen (O2)
• What are produced from reaction?
• Combustion reaction always produce H2O and CO2
• For example,
• __CH4 + __O2 -> ___CO2 + __H2O * Coloured in red are hydrocarbons
• __C4H10 + __O2 -> ___CO2 + __H2O

Single displacement

• Example:
• Fe + CuCl2 -> FeCl2 + Cu
• Zn + HNO3 -> Zn(NO3)2 + H2
• Keep in mind that not all chemicals reactions take place due to activity series which you will learn later on with your teacher in class
• E.g Al + MgCl2 --> No reaction
• __Mg + __AlCl3 --> __MgCl2 + Al
• If you want to find out more about activity series you can ask me directly or refer to the link below
• http://www.oakparkusd.org/cms/lib5/CA01000794/Centricity/Domain/934/Steps%20to%20Predicting%20the%20Products%20of%20Chemical%20Reactions%20.pdf

Double displacement

• Cation and anion switch places
• E.g __ Ca(OH)2 +__ HCl --> CaCl2 + H2O
• AX + BY --> AY + BX
• In order for double displacement to occur
• 1). Both reactants must be soluble in water AX(soluble) + BY(soluble)
• 2). One soluble and one insoluble AX(soluble) + BY(insoluble)
• usually precipitations forms with the insoluble reactant

Balancing equations

• https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/v/balancing-chemical-equations-introduction?v=TUuABq95BBM (Incorporar)
• https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/v/balancing-more-complex-chemical-equation (Incorporar)
• Legenda: Basic chemical equation video
• Legenda: More complexing balancing video