home *** CD-ROM | disk | FTP | other *** search
- t
-
-
-
-
-
-
-
-
- @AtGraphic 130,100
- '@Picture AED30_01.bmp
- @At 135,15
- It has taken 50ml of 1M sulphuric acid to neutralise the 100
- ml of sodium hydroxide.
-
-
- #b#crWhat is the concentration of sodium hydroxide?#b
-
-
-
- @Prompt
-
-
-
-
- @At 132,74
- Step 1 Write the equation #[N36]
-
-
- '@Answer 1
-
- '@Feedback Wrong
- '#bNo#b, the reaction produces sodium sulphate and water and
- 'must be balanced.
-
- '@Animation BoseGrim
-
- '@Feedback Correct
- '#bCorrect!#b
-
- '@Animation BoseSmile
-
-
-
-
- @Question
- @Prompt
-
-
- @At 128,109
- Step 2 Calculate the number of moles of acid required for
- neutralisation
-
- No of moles in 50ml = #^50 x 1 = #[N36] moles
- #t#[N36]
-
- '@Answer 1
-
- '@Feedback Wrong
- '#bNo#b, there is 1 mole in 1000 ml so you should divide
- 'the volume used by 1000 which gives you 0.05
-
- '@Animation BoseGrim
-
- '@Feedback Correct
- '#bRight!#b the volume is 1/20th of a litre so the number of moles
- 'is 1/20th = 0.05 moles.
-
-
- '@Animation BoseSmile
-
-
-
-
-
- @Question
- @Prompt
-
- @At 130,194
- Step 3 Work out the Mole ratio
- Mole ratio of H2SO4 : NaOH = #[N36] : #[N36]
-
- '@Answer 1
-
- '@Feedback Wrong
- '#bNo#b, twice the amount of sodium hydroxide
- 'is needed for each sulphuric acid.
-
- '@Animation BoseGrim
-
- '@Feedback Correct
- '#bCorrect!#b
-
- '@Animation BoseSmile
-
-
-
- @Question
- @Prompt
-
- @At 135,250
- Step 4Calculate the number of moles of the second reactant
- No of moles of NaOH reacting = #[N36] moles
-
- '@Answer 1
-
- '@Feedback Wrong
- '#bNo#b, there are twice the number of moles of NaOH which is
- '0.05 x 2 = 0.1 moles
-
- '@Animation BoseGrim
-
- '@Feedback Correct
- '#bYes#b,
-
- '@Animation BoseSmile
-
-
-
- @Question
- @Prompt
-
- @At 133,313
- Step 5 Work out concentration in given volume.
-
- Concentration of NaOH = #^#[N36] x #[N36]= #[N36] mol dm-3
- #t100
-
-
- '@Answer 1
-
- '@Feedback Wrong
- '#bNo#b, you need to find out how many moles there would be in
- '1 litre by multiplying by 10.
-
- '@Animation BoseGrim
-
- '@Feedback Correct
- '#bWell done#b, you have successfully
- 'calculated the concentration of sodium
- 'hydroxide.
-
-
- '@Animation BoseSmile
-
-