| |
28 Jul 2009, 6:52 PM
| #1 (permalink) |
| Supreme Member  HSC: 2009 Gender: Male
Join Date: Mar 2008
Posts: 1,281
Last Activity:
Today, 11:23 AM  | Titration Practical Exam Troubles! You can hide this advertisement by registering. i just received my titration practical exam back, and lets just say my mark was not the best.MUCH of the marks i had lost were due to the fact that i had done the exam and answered the questions based on the presumption that the solution of KNOWN concentration is poured into the burette. my teacher however, sees differently and is set on the "fact" that the solution of UNKNOWN concentration is is poured in the burette. i have gathered evidence (both from textbooks etc and mathematical) to support my point of view (that either way is fine), but before i take it any further i'd like to know what you all think OR know? known or unknown in the burette? |
|  |
|
28 Jul 2009, 6:57 PM
| #2 (permalink) |
| <3 Prophet 9 AyyyTAR Hater  HSC: 2009 Gender: Female Location: Sydney
Join Date: Jun 2008
Posts: 3,279
Last Activity:
Today, 2:25 PM  | Re: Titration Practical Exam Troubles! Doesn't matter as the calculations should come out as the same answer. At my school we usually use an UNKNOWN concentrationn of NaOH to titrate with a known concentration of a random weak acid (usually acetic). The NaOH goes into the burrette and phenolphthalein is used  So yeah, take further action! 
__________________ Courses: Extension 1 + 2 maths, Chemistry, Physics, Modern History and Advanced English UAI aim: 99+ Click the user bars to join the groups of the era   Want a friendly tutor with experience and plenty of resources? Click here, but hurry as there's only one slot left! |
|
| |
|
28 Jul 2009, 7:12 PM
| #3 (permalink) |
| Supreme Member HSC: 2009 Gender: Male
Join Date: Mar 2008
Posts: 1,281
Last Activity:
Today, 11:23 AM | Re: Titration Practical Exam Troubles! i will, funnily enough, my calculated concentration of the unknown turned out to be 0.28M - the actual concentration was 0.29M  |
|
| |
|
28 Jul 2009, 7:16 PM
| #4 (permalink) | |
| <3 Prophet 9 AyyyTAR Hater HSC: 2009 Gender: Female Location: Sydney
Join Date: Jun 2008
Posts: 3,279
Last Activity:
Today, 2:25 PM | Re: Titration Practical Exam Troubles! Quote:
 Now go and get those well deserved marks back 
__________________ Courses: Extension 1 + 2 maths, Chemistry, Physics, Modern History and Advanced English UAI aim: 99+ Click the user bars to join the groups of the era Want a friendly tutor with experience and plenty of resources? Click here, but hurry as there's only one slot left! | |
|
| |
|
28 Jul 2009, 9:03 PM
| #5 (permalink) |
| Supreme Member HSC: 2008 Gender: Undisclosed
Join Date: May 2008
Posts: 1,278
Last Activity:
Today, 5:14 PM | Re: Titration Practical Exam Troubles! As stated above, it does not matter which way, you get the same answer. But apparently it is correct chemistry convention to put the unknown in the Burette, just like it is correct chemistry convention to, when drawing a diagram of a galvanic cell, to place the ANODE on the LEFT. |
|
| |
|
28 Jul 2009, 9:11 PM
| #6 (permalink) | |
| <3 Prophet 9 AyyyTAR Hater HSC: 2009 Gender: Female Location: Sydney
Join Date: Jun 2008
Posts: 3,279
Last Activity:
Today, 2:25 PM | Re: Titration Practical Exam Troubles! Quote:
__________________ Courses: Extension 1 + 2 maths, Chemistry, Physics, Modern History and Advanced English UAI aim: 99+ Click the user bars to join the groups of the era Want a friendly tutor with experience and plenty of resources? Click here, but hurry as there's only one slot left! | |
|
| |
 |
| Bookmarks |
| Thread Tools | |
| Rate This Thread | |
| |
