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:
1When 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’
21. Write down the chemical formulae for these ionic compounds: Silver ChlorideMagnesium SulfateSodium HydroxideBarium CarbonatePotassium NitrateIron (II) SulfateZinc Hydroxide2. Circle the insoluble compounds
3Reactant(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)
4One 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.
6EXAMPLE 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.
7EXAMPLE TWOCalcium metal reacts violently with water, producing hydrogen gas and calcium hydroxide.Reactants:Products:Chemical equation:
8EXAMPLE THREEWhen sodium hydroxide and barium nitrate are mixed together, white/cloudy precipitate is formed.Reactants:Products:Word equation:Symbol equation:
9When 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
10But 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
11Is 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