Year 10 2013 end of year exam revision

The end of year exams are looming. It is important that you finish the year strongly and don’t switch off early. Read through the notes and watch the videos on acids and bases before attempting the questions at the end

We have studied the reactions of acids with:

  • bases
  • metals
  • carbonates

We have used word equations to produce fully balanced chemical equations in three steps. For a little more information on this process have a look at this post about the space shuttle being blasted into orbit on the back of  a huge pop test.

the basic word equations we use are:

acid     +     base                      —–>     salt     +     water

acid     +     metal                    —–>     salt     +     hydrogen

Acid     +    carbonate               —–>    salt      +     carbon dioxide     +      water

Use these word equations to answer the questions below.

Year 10, writing fully balanced chemical equations homework

Year 10, writing fully balanced chemical equations homework

A whole lot of the chemistry you have studied this year comes together in this exercise.

  • ions and how they are formed.
  • naming ionic compounds and writing their formula
  • word equations.

…….. and finally the last piece in the jigsaw writing a fully balanced chemical equation.

If you study NCEA chemistry at level 1 next year a rough guide is

Achievement: writing word equations.

Merit: Inserting chemical formulae into an equation.

Excellence: producing a fully balanced chemical equation.

Revise what we did today by watching the video then do the short exercise. In your notebook write down the word equation and complete it (achievement) Underneath the word equation insert the chemical formula of each substance (merit). Finally balance the equation (excellence) NOTE this usually involves sticking 2 in front of something

1 sodium hydroxide      +   sulphuric acid             ——->

2 copper oxide                 +  hydrochloric acid     ——–>


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