# data[].attributes.body
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?

# data[].attributes.body
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)?

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.body
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

# data[].attributes.body
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?

# data[].attributes.body
You could use your own spectra, or you could use the model spectra that was provided in this folder.

# data[].attributes.body
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.

# data[].attributes.body
Does It matter what date we put for the lab report?

# data[].attributes.body
Yes it does. You should provide a date based on when you started writing the document.

Nimesh

# data[].attributes.body
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.

# data[].attributes.body
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

# data[].attributes.body
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

# data[].attributes.body
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

# data[].attributes.body
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

# data[].attributes.body
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

# data[].attributes.body
Press the selection tool on your arrow and you can resize and rotate it by moving the corners and sides of the box.