CHM Lab Midterm

-Hazard signs such as "Flammable," "Oxidizer," and "Corrosive" -gas cylinder sign -NFPA diamond

Which types of signs are posted to convey information about chemical storage?

When everyone in the room is done handling any chemicals or glassware

Determine when you should remove your goggles in the lab room.

specialized

General spill kit or specialized? Mercury

general

General spill kit or specialized? acetone

Neutralize the spill before cleaning it up

Most laboratory chemical spills are cleaned up in a similar manner, but acid and base spills require an extra step. What is this extra step?

-check labels or instruction before disposal -always wear appropriate personal protective equipment

What are the best practices for safely handling waste in the lab?

Pour some of the reagent from the bottle into a beaker, then use as needed in the procedure

What is generally the best approach when liquid from a large reagent bottle is needed in an experiment?

Before handling any glassware or chemicals for the experiment

When do you put on disposable gloves?

check and see if anyone else can use the chemical. If not, discard in the proper waste container.

A student removes a chemical sample from a reagent bottle to be used in an experiment. What should he do with any excess chemical remaining from this sample after the experiment is complete?

-knowing safety equiptment available -knowing location of safety equiptment -knowing how to use safety equiptment

All lab participants must remain prepared to use safety equipment in case of emergency. Identify the components of effective preparation.

specialized

General spill kit or specialized? hydroflouric acid

general

General spill kit or specialized? methanol

generalized

General spill kit or specialized? phosphoric acid

get thick gloves or dustpan; all broken glass; broken glass container

If you drop or break glassware in lab, first ______ Then, carefully collect ______ Finally, place all that material into the _____