Here's what a star student thought of this essay
Quality of writing
The spelling, grammar and punctuation are fine. The technical terms could have been put into a glossary which would further show the understanding of the student. This would also be a place for explaining the steps for calculating e.g. moles. Such further explanations will make a piece of work stand out as other students are less likely to do it. Glossaries show the understanding of the technical terms used (unless they have been integrated into the piece of work itself). The student follows the typical layout of the piece of work and this is recommended as it is the easiest and best way to present such work in a logic and coherent manner.
Level of analysis
The student shows high analytical skills towards understanding the experiment and this is all supported with relevant evidence. Their judgements were all sensible from the data that they collected. However, one flaw of this that I picked up on was the inconsistency of decimal places or significant figures in the table. This is key as inconsistency can ruin an experiment. Yet, I do not think this would have affected the mark greatly. Their conclusion was logical and followed from their previous paragraphs. This is good as the conclusions should not be a surprise to the examiner.
Response to question
The student has very clearly and logically answered the set question. They have supported their answer well and the calculations are clearly explained. I would suggest explaining why the calculations are being done (as in what each step means) but this is not compulsory. The student shows a very solid and strong understanding of the topic and of the experiment. Their answer is coherently displayed and justified.