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11 Jul 2009, 10:46 PM
| #1 (permalink) |
| Fat Donuts HSC: N/A Gender: Undisclosed
Join Date: Apr 2007
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Today, 9:01 PM  | Titrating a strong acid and strong base using phenolphtalein You can hide this advertisement by registering. Hi,I understand that the range for Phenolphthalein is pH 8.3 - 10 But when titrating a strong acid and base (eg NaOH and H2SO4) the product will be pH 7... so I don't understand why you can use phenolphthalein for this. Could someone please explain it for me? Thanks |
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11 Jul 2009, 11:00 PM
| #2 (permalink) |
| Supreme Member  HSC: 2009 Gender: Male
Join Date: Dec 2008
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Today, 1:22 AM | Re: Titrating a strong acid and strong base using phenolphtalein have u seen a graph for this type of reaction ph against NaOH (mL) graph it shows 1 drop of base at the equivalence pt makes ph go from 3 to 10, since phenolpthaleins ph indicator is in the region it is acceptable to use it for a strong acid strong base titration.
__________________ cheap HSC books and some preliminary books aswell here http://community.boredofstudies.org/...ext-1-2-a.html Phys chem MX2---- not unfortunately i dropped it and did 2u instead, now i'm ashamed ='( std english business studies |
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11 Jul 2009, 11:03 PM
| #3 (permalink) |
| Fat Donuts HSC: N/A Gender: Undisclosed
Join Date: Apr 2007
Posts: 1,240
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Today, 9:01 PM | Re: Titrating a strong acid and strong base using phenolphtalein Yeah... But if it's pH 7, then phenolphthalein will still be clear and show no colour changes... so...? |
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11 Jul 2009, 11:03 PM
| #4 (permalink) |
| The A-Team  HSC: 2008 Gender: Male Location: Albury-Wodonga, NSW
Join Date: Nov 2006
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Today, 9:53 PM | Re: Titrating a strong acid and strong base using phenolphtalein yeah, thats the answer, its almost a vertical line at the equivalence point
__________________ SUBJECTS: 2008: Chemistry| Mathematics Ext. 1| Physics| English 2U| PD/H/PE 2009: Mathematics Ext. 2 | 2010 : B Engineering (Civil or Electrical) @Uni of Melb |
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11 Jul 2009, 11:18 PM
| #5 (permalink) |
| Supreme Member HSC: 2009 Gender: Male
Join Date: Dec 2008
Posts: 1,304
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Today, 1:22 AM | Re: Titrating a strong acid and strong base using phenolphtalein do u have jacarnada? it has it in there i think. the graph. if u dnt i can send u an electronic copy of it i have on my laptop
__________________ cheap HSC books and some preliminary books aswell here http://community.boredofstudies.org/...ext-1-2-a.html Phys chem MX2---- not unfortunately i dropped it and did 2u instead, now i'm ashamed ='( std english business studies |
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