This is not trivial - your risk assessment should be taken seriously. Always start with considering "risk to eyes". This is the most common accident in the Chemistry lab and potentially has the most severe consequences.
Your prac is going to be generating and collecting hydrogen gas, and it looks like a considerable volume of hydrogen gas. Have you ever experienced a hydrogen gas explosion?
Your risk assessment should be laid out in the form of a table with your triage of risk. Due to the design of your apparatus, you have to consider the consequences of a hydrogen gas explosion, reverse siphoning liquid from the water trough to the reaction flask, and spillage of acid.
Column 1 - Identify the hazard, e.g. ignition of hydrogen
Column 2 - Possibility to eliminate the item or replace the item with something with less risk
Column 3 - What you are going to do about the remaining risk, e.g. personal protective equipment, ventilation, display signage, remove ignition sources, dilute wastes before disposal to the sewer, etc etc