A metal complex absorbs light in the red region of the spectrum. What colour does it appear to be?

Eye Wash and Safety Shower Stations

How many eye wash/safety shower stations are there?

Footware

During your chemistry laboratory sessions it is compulsory to wear appropriate footwear. Using the figure below as a guide, select the items of footwear which are inappropriate for the chemistry laboratory.

Fire Extinguishers

Most of the fire extinguishers located throughout the laboratory are carbon dioxide fire extinguishers, since often, water should not be used on a fire in a chemistry laboratory.

From the options below, select the types of fires where water should not be used.

Emergency Protocols

In the case of an emergency, we may be evacuated from the laboratory. In the case of an evacuation, the following protocols must be observed:

• Upon hearing the warning siren (a beeping sound), we must prepare to evacuate. This means make the laboratory safe (e.g. switch off hotplates, replace caps on reagents) and prepare to leave the laboratory (e.g. remove gloves, retrieve phones).
• When we hear the evacuation siren (a whooping sound), head towards the nearest emergency exit, and gather at the evacuation assembly area (at 14 Rainforest Walk, in front of the Faculty of Science Student Lounge).
• We must remain at the assembly area until the All Clear is given to return to the laboratory.

Referring to the emergency evacuation plan in your laboratory manual, in which direction/s are the emergency exit/s for the First Year Laboratories?

When you add ammonia to a solution it is important to remember that you change the concentration of the hydroxide ions present due to the reaction:

NH₃ (aq) + H₂O (l)NH₄⁺ (aq) + OH^- (aq)

Remembering this will help you with at least two of the steps in this exercise.

In many metal-containing solutions, the addition of ammonia causes a hydroxide precipitate to form. Select the statement below which best describes this observation.

When you add ammonia to a solution it is important to remember that you change the concentration of the hydroxide ions present due to the reaction:

NH₃ (aq) + H₂O (l)NH₄⁺ (aq) + OH^- (aq)

Remembering this will help you with at least two of the steps in this exercise.

In many metal-containing solutions, the addition of ammonia causes a hydroxide precipitate to form. Select the statement below which best describes this observation.