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- K@AtGraphic 235,88
- @CreateAnimate ADC30,ADC30_0,1,4,100,true
- @StartAnimate ADC30,true,true,true
- @prompt
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- @PlaySoundFile ADC30_01.wav
- @AtGraphic 130,100
- '@Picture ADC30_01.bmp
- @At 135,15
- To complete a chemical equation you should describe what
- state the substance is in.
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-
- There are four main states which have the following symbols
-
- solid (s)
- liquid (l)
- gas (g)
- aqueous (aq)
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- @WaitForSoundToFinish
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- @Prompt
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- @PlaySoundFile ADC30_02.wav
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- @At 135,150
- The solid and gas states are obvious but you need to be careful
- with liquid and aqueous states.
- (l) - the liquid state is only used for pure liquids of a compound
- eg molten sodium chloride or water.
- (aq) - the aqueous state is used for substances that are dissolved
- in water eg acids
- @WaitForSoundToFinish
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- @Prompt
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- @At 135,250
- To show the states in an equation you write the state symbols
- just after the compound.
- To enter them in the equation editor just click on the small box
- after each reactant and product and select the one you want
- from the list.
-
- @Wait 1
- Try writing the equation for solid aluminium oxide with hydrochloric
- acid showing the states of each substance.
- @WaitForSoundToFinish
-
- '@At 100,100
- '
- '@answer Al2O3(s) + 6HCl(aq) -> 2AlCl3(s) + 3H2O(l)Yes, you have balanced successfully and got the correct state symbols
- '
- '@feedback incorrect balanceNo, have a look at your balancing you must make sure that there are the same number of atoms on each side of the equation.
- '
- '@feedback wrong state symbolsNo, have a look at the correct state symbols.