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9 Cards in this Set
- Front
- Back
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Acids and bases: 1) React together in? – This is where? 2) The end point is known as? |
1) Neutralisations reactions. – [H+] = [OH¯]. 2) The equivalence point. |
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Determining the end point: 1) We can use? |
Either a pH meter or an indicator. |
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Methyl Orange: 1) pH range? 2) Observations: – At low pH? – At high pH? |
1) 3.1 - 4.4. 2) Observations: – At low pH(Acidic): Red. – At high pH (Alkaline): Yellow. |
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Phenolphthalein: 1) pH range? 2) Observations: – At low pH? – At high pH? |
1) 8.3-10. 2) Observations? – At low pH: Colourless. – At high pH: Pink. |
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Neutralisation reaction for: Strong Acid/Strong Base
1) The graph? 2) The equivalence point? 3) Indicator? |
1) Curve starts at low pH, long vertical section, settles off at high pH. 2) When pH = 7. 3) Either indicator. |
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Neutralisation reaction for: Strong Acid/Weak Base
1) The graph? 2) The equivalence point? 3) Indicator? |
1) Curve starts at low pH, fairly long vertical section and evens off at around pH 9. 2) pH < 7. 3) Methyl Orange. |
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Neutralisation reaction for: Weak Acid/Strong Base
1) The graph? 2) The equivalence point? 3) Indicator? |
1) Starts at around pH 4, then has a fairly long vertical section which evens off at around pH 13. 2) pH > 7. 3) Phenolphthalein . |
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Neutralisation reaction for: Weak Acid/Weak Base
1) The graph? 2) The equivalence point? 3) Indicator? |
1) The graph starts at around pH 5, has a sort of 'dink' and evens off at around pH 9. 2) Is very hard to point as their is no sudden pH change. 3) No indicators will really work due to there being no sharp pH change, we'd have to use a pH meter where the pH of neutralisation will be around pH 7. |
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Half-equivalence: 1) Is? 2) At this point? 3) Derived expression? |
1) The point of half the volume of neutralisation. 2) [HA] = [A¯]. 3) Ka = [H+]. |
