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When a lump of zinc is added into copper sulfate solution, the two slowly react to produce very small dark copper granules and zinc sulfate solution. 1.Write.

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Presentation on theme: "When a lump of zinc is added into copper sulfate solution, the two slowly react to produce very small dark copper granules and zinc sulfate solution. 1.Write."— Presentation transcript:

1 When a lump of zinc is added into copper sulfate solution, the two slowly react to produce very small dark copper granules and zinc sulfate solution. 1.Write down the word equation 2.Write down the symbol equation 3.Define ‘displacement reaction’

2 1. Write down the chemical formulae for these ionic compounds: a)Silver Chloride b)Magnesium Sulfate c)Sodium Hydroxide d)Barium Carbonate e)Potassium Nitrate f)Iron (II) Sulfate g)Zinc Hydroxide 2. Circle the insoluble compounds

3 Chemical Equations Every chemical reaction has: reactants (the stuff that react) and; products (the stuff produced) And the chemical equation always looks like: Reactant(s) → Product(s)

4 There are TWO types of chemical equations: 1. Word Equation Calcium + Water → Hydrogen + Calcium Hydroxide 2. Symbol Equation Ca + H 2 O → H 2 + Ca(OH) 2 One is simply the translated version of the other.

5 EXAMPLE ONE

6 Magnesium burns very brightly when heated. After the combustion, magnesium oxide (the white powder/ash) remains. 1.What are the reactants? (hint: when something “burns” it reacts with oxygen) 2.What is the product? 3.Write down the chemical equation. EXAMPLE ONE

7 EXAMPLE TWO Calcium metal reacts violently with water, producing hydrogen gas and calcium hydroxide. 1.Reactants: 2.Products: 3.Chemical equation:

8 EXAMPLE THREE When sodium hydroxide and barium nitrate are mixed together, white/cloudy precipitate is formed. 1.Reactants: 2.Products: 3.Word equation: 4.Symbol equation:

9 When a lump of magnesium is dropped into a pool of hydrochloric acid, they react violently, producing hydrogen gas and magnesium chloride solution. Word Equation: Symbol equation: HCl+Mg→H2H2 +MgCl 2 Hydrochloric Acid +Magnesium→ Hydrogen Gas + Magnesium Chloride

10 HCl+Mg→H2H2 +MgCl 2 But there is a small problem… 1.Compare the number of hydrogen atoms on each side 2.Compare the number of chlorine atoms (ions) on each side This is an ‘unbalanced’ symbol equation

11 *Balancing Symbol Equations Balance the equation by writing the number(s) in front of the reactant(s) and/or product(s). HCl + Mg → H 2 + MgCl 2 Is this equation now balanced? Note: NEVER EVER change the formula of reactants or products 2

12 Balanced or Unbalanced? a)H 2 + O 2 → H 2 O 2 b)NaCl + AgNO 3 → AgCl + NaNO 3 c)CuSO 4 + Zn → ZnSO 4 + Cu d) NaOH + ZnSO 4 → Na 2 SO 4 + Zn(OH) 2 e)HCl + NaOH → NaCl + H 2 O f) Mg + O 2 → MgO g) H 2 + O 2 → H 2 O h)CaO + HCl → CaCl 2 + H 2 O

13 Balanced or Unbalanced? a)H 2 + O 2 → H 2 O 2 b)NaCl + AgNO 3 → AgCl + NaNO 3 c)CuSO 4 + Zn → ZnSO 4 + Cu d) NaOH + ZnSO 4 → Na 2 SO 4 + Zn(OH) 2 e)HCl + NaOH → NaCl + H 2 O f) Mg + O 2 → MgO g) H 2 + O 2 → H 2 O h)CaO + HCl → CaCl 2 + H 2 O 2 22 22 2

14 Copy all equations; find the THREE unbalanced equations and balance them. a) Zn + Pb(NO 3 ) 2 → Pb + Zn(NO 3 ) 2 b) Mg + O 2 → MgO c) Fe + CuSO 4 → Cu + FeSO 4 d) H 2 O → H 2 + O 2 e)HNO 3 + Na 2 CO 3 → NaNO 3 + H 2 O + CO 2


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