Student Experiment Rationale

[jinx_58]

Howdy!

Could someone please give me feedback on my rationale for my student experiment?

Attached is my student experiment, not complete as of yet because experiment has not yet been conducted.
The task sheet and the mandatory prac that's being modified is also attached.

Any feedback is appreciated, from things like grammar and spelling to scientific accuracy.

Many Thanks 

[Billuminati]

I have a few suggestions listed below. Note that I haven't read through the task sheet in a lot of detail as I have to study for the GAMSAT, but I can see some room for improvement

1. Include concentration of sodium thiosulfate
2. Put the equation in the intro where u discuss the theory, it's best to put it in chemical symbols with the appropriate states
3. You alluded to quantitative vs qualitative data, but make sure you say those explicitly
4. I don't know what the expectations are for QCE but I don't think you're supposed to give an overly detailed description of your methods in the intro (you can still propose how you plan to modify the original experiment)
5. Please explain collision theory in terms of "more particles on average have the required amount of kinetic energy to react (also mention more frequent collisions) hence the reaction proceeds faster"
6. Again, state the concentration of sodium thiosulfate. If possible, convert the concentration and volume to moles.
7. You should use HCl in the fumehood for risk assessment, u need to identify which kind of waste beaker each chemical goes in (eg putting powdered metal into the corrosive waste beaker is a big no no as the resulting redox reaction may blow up the lab. I nearly did this in 1st year uni chem)
8. Methods section should be written in past tense, 3rd person and passive voice (eg 20 mL (include concentration or moles) of sodium thiosulfate solution were added to a beaker)
9. If you have theoretical results, you can perform a percentage error calculation. It's given by ((experimental value- theoretical value)/(theoretical value)) * 100.

[jinx_58]

Thank you!

The main problem with theorised results is that I can't find any.
I've researched but to no avail.

I'll dig deeper and hopefully I'll find something.

Also, what's a fumehood?

Thanks again

[Billuminati]

Thank you!

The main problem with theorised results is that I can't find any.
I've researched but to no avail.

I'll dig deeper and hopefully I'll find something.

Also, what's a fumehood?

Thanks again

The fume hood is what your document refers to as the fume cupboard. You perform reactions that produce toxic gases in there so the gas is sucked away and u don't breath it in