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."— 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.Write down the word equationWrite down the symbol equationDefine ‘displacement reaction’
2 1. Write down the chemical formulae for these ionic compounds: Silver ChlorideMagnesium SulfateSodium HydroxideBarium CarbonatePotassium NitrateIron (II) SulfateZinc Hydroxide2. Circle the insoluble compounds
3 Reactant(s) → Product(s) Chemical EquationsEvery 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 One is simply the translated version of the other. There are TWO types of chemical equations:1. Word EquationCalcium + Water → Hydrogen + Calcium Hydroxide2. Symbol EquationCa H2O → H Ca(OH)2One is simply the translated version of the other.
6 EXAMPLE ONEMagnesium burns very brightly when heated. After the combustion, magnesium oxide (the white powder/ash) remains.What are the reactants? (hint: when something “burns” it reacts with oxygen)What is the product?Write down the chemical equation.
7 EXAMPLE TWOCalcium metal reacts violently with water, producing hydrogen gas and calcium hydroxide.Reactants:Products:Chemical equation:
8 EXAMPLE THREEWhen sodium hydroxide and barium nitrate are mixed together, white/cloudy precipitate is formed.Reactants:Products:Word equation: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:HydrochloricAcid+Magnesium→HydrogenGasChlorideHCl+Mg→H2MgCl2
10 But there is a small problem… Compare the number of hydrogen atoms on each sideCompare the number of chlorine atoms (ions) on each sideThis is an ‘unbalanced’ symbol equationHCl+Mg→H2MgCl2
11 Is this equation now balanced? *Balancing Symbol EquationsBalance the equation by writing the number(s) in front of the reactant(s) and/or product(s).HCl Mg → H MgCl2Is this equation now balanced?Note: NEVER EVER change the formula of reactants or products2
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