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Unit 2: Chemical Reactions

Unit 2: Chemical Reactions. SCH3U. Describing Chemical Reactions: 1. Word Equations. i ron + oxygen  iron(III) oxide. reactants products. Reversible reaction:. 2 Al(s) + 3 Br 2 (g)  2 AlBr 3 (s). 2. Balanced Chemical Equations. coefficient.

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Unit 2: Chemical Reactions

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  1. Unit 2: Chemical Reactions SCH3U

  2. Describing Chemical Reactions: 1. Word Equations iron + oxygen  iron(III) oxide reactants products Reversible reaction:

  3. 2 Al(s) + 3 Br2(g)  2 AlBr3(s) 2. Balanced Chemical Equations coefficient Each atom on reactant side must have a corresponding atom on product side.

  4. H2(g) + Cl2(g)  HCl(g) Balancing Chemical Equations Write equation. Show the physical state of each reactant and product. Don’t forget diatomic elements: H2, N2, O2, F2, Cl2, Br2, I2. Count the atoms on each side. Identify any polyatomic ions. Add coefficients to make the numbers of each element or polyatomic ion equal on each side. Write coefficients in their lowest possible ratio. Double check your work.

  5. Ex. Aqueous solutions of silver nitrate and calcium chloride react to produce solid silver chloride and aqueous calcium nitrate.

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