Laboratory Safety, Storage, and Chemical Disposal

Practice flashcards covering laboratory safety equipment, chemical storage guidelines, and safe chemical disposal procedures.

In the laboratory, hand wash is used for removing chemical substances, oil, dirt, and __________ from the hands.

microorganisms

Reactive substances such as sodium and potassium must be stored in __________ to prevent reaction with moisture in the air.

paraffin oil

Reactive substances like sodium and potassium are kept in paraffin oil specifically to prevent reaction with the __________ in the air.

moisture

Volatile and inflammable liquids such as hydrocarbons and organic solvents must be stored in shady areas far from sunlight and __________.

heat source

Substances that decompose easily in the presence of light, such as liquid chlorine and bromine, are stored in __________.

dark bottles

Chemical substances with $pH < 5$ and $pH > 9$ must be stored in special storage cabinets that are kept __________.

locked

Heavy metals and toxic substances such as mercury must be placed in special labelled containers and stored in a locked room that is __________.

heat free

Hydrogen peroxide acts as a disinfectant and a(n) __________.

bleaching agent

Hydrogen peroxide at a low concentration can be disposed of by being poured directly into the __________.

sink

High concentration hydrogen peroxide must be diluted with $H_2O$ and added with __________ to allow the decomposition process to take place before disposal.

sodium sulphite

Because they are mostly toxic and inflammable, organic solvents and hydrocarbons are disposed of into special containers made of glass and __________.

plastic

Strong acids and alkalis with $pH < 5$ and $pH > 9$ must be kept in closed containers during disposal because they can damage the sink and react with $H_2O$ to release high heat and __________.

toxic gases

Solutions of heavy metals and toxic substances should be left to evaporate in the __________.

fume chamber

After evaporating, heavy metals and toxic substances kept in carefully tied plastic bags are put into the container of __________.

heavy metal waste

Solid wastes such as glass and rubbers must be disposed of into __________.

special containers

Volatile substances like alcohol and bromine are defined as substances that easily convert to __________ at room temperature.

gas

Certain volatile substances are hazardous and can be fatal if inhaled in __________.

large amounts