https://padlet.com/nmistry2/2w9xdf1tehu3iwzl Discussion board for you lab report en-us 2022-03-17 20:12:00 UTC 2022-04-28 14:22:27 UTC hello@padlet.com nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100754600 Qu from a student:
For the unit 4 paracetamol lab report, is there a certain word count I need to be aiming for?

Answer:
It should be 1000 - 1500 words]]> 2022-03-17 20:21:23 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100754600 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100758319 Qu from a student:
Also, for the reaction mechanism for the paracetamol reaction, does the acetic anhydride become protonated at the start of the reaction by the water to be able to react with 4-aminophenol or is the water used later in the mechanism? 

Answer:
Water is mostly a solvent but it can be used to add/remove protons as necessary. In this reaction you don't need to protonate acetic anhydride first]]> 2022-03-17 20:24:45 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100758319 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100761618 Qu from a student:
A question on the TLC from the paracetamol experiment. Why does the paracetamol travel further than the 4-aminiphenol if it's more polar and therefore less soluble in non polar solvents. Why is a mixture of ethyl acetate, petroleum ether and acetic acid used? 

Answer:
Aminophenol is in fact more polar than paracetamol. Hydrogen-bonding is also an important factor for making molecules bind to the silica and aminophenol has more hydrogen bonds than paracetamol.

Student:
Why isn't paracetamol more polar with its additional CO bond? And why isn't paracetamol able to form more hydrogen bonds as it's got more electronegative atoms with lone pairs and hydrogen atoms to do so? 

Answer:
N-H bond is more polar than C=O at there is a greater electronegativity difference between N and H than there is for C and O

]]> 2022-03-17 20:27:54 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100761618 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100763421 I am trying to draw mechanisms on chem draw for the paracetamol lab report but I am finding it hard to manipulate the curly arrows so that they can go directly from the lone pair to the carbon atom I would appreciate some help on this]]> 2022-03-17 20:29:36 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100763421 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100768681 Press the selection tool on your arrow and you can resize and rotate it by moving the corners and sides of the box.]]> 2022-03-17 20:34:59 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100768681 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100770593 2022-03-17 20:36:54 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100770593 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100775519 Qu from a student:
Would the aim be to practice and learn how to carry out new skills such as recrystallisation and vacuum filtration or would it be to produce a medicine?

Answer:
The aims would be about making paracetamol rather than your skill development.]]> 2022-03-17 20:41:41 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2100775519 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2101726468 Does It matter what date we put for the lab report?]]> 2022-03-18 11:04:05 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2101726468 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2104862000 Yes it does. You should provide a date based on when you started writing the document.

Nimesh]]> 2022-03-21 08:52:08 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2104862000 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2105363517 2022-03-21 13:51:58 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2105363517 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2107197387 Some peaks will be NMR solvent peaks - chloroform at around 7.2 and water in the solvent bottle around 1.53.

You can ignore impurities when reporting the peaks in your experimental. You only assign the peaks of your product.

However, for the results and discussion you do want to mention you have impurities and  try and identify what they are and how they haven ended up in your final sample.

Nimesh]]> 2022-03-22 10:24:03 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2107197387 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2107324229 Question
Is the melting point the temperature it started melting, finished melting or is it a range of the two?

Answer:
It should always be quoted as a range from when it first melts to when it has finished.]]> 2022-03-22 11:52:58 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2107324229 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2108135940 My NMR tube was wet when the sample was added so the only peak visible on my spectrum is acetone, do I still include the data or just write about this in the results and discussion section?]]> 2022-03-22 18:10:35 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2108135940 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2108302131 When I vacuum filtered my solid after recrystallising the filter paper had a hole in it and I ended up having to do the recrystallisation and vacuum filtration again. Do I need to include this problem in the report and if so in which section? Thanks]]> 2022-03-22 19:52:37 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2108302131 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2109384115 You could use your own spectra, or you could use the model spectra that was provided in this folder.]]> 2022-03-23 10:09:25 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2109384115 nmistry2 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2109386336 You could probably just summarise that you repeated the recrystalisation after the first attempt due to the filtration but you don't need to go into a lot of detail.]]> 2022-03-23 10:11:01 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2109386336 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2109824248 Question
What tense do we write the results and discussion section in?

Answer:
Always write in the past tense and passive voice. See the example report in the week 15 folder as a guide.]]> 2022-03-23 14:21:23 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2109824248 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2154590289 Do we need to write the experiment for each of the temperatures (including the ones we were given the data for) or should we do a general outline stating that data was logged in different ways for different temperatures (explaining the 2 ways)?]]> 2022-04-23 14:18:18 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2154590289 https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2162724974 do we have to do an abstract and introduction for the porter report because there isn't one in the example but we needed an abstract for the priestley report? ]]> 2022-04-28 14:22:27 UTC https://padlet.com/nmistry2/2w9xdf1tehu3iwzl/wish/2162724974