Midterm Review (Chemistry)

A student splashes chemicals on their clothes during an experiment, what object in the room should they use?

• Eyewash station

• Safety shower

• Fire extinguisher

• More than one of these

The image shows students in the laboratory performing an experiment. What unsafe practices are demonstrated?

• The student is not wearing goggles, is touching hot glass without a glove and is using cracked glass.

• The student is not wearing goggles, the Bunsen burner is setup incorrectly and he is pointing the test tube towards his face.

• The student is not using a clamp to warm the test tube, does not have his hair tied back, and is using cracked glass.

• The student is using cracked glass, is pointing the test tube towards his face, and does not have long sleeves on.

What equipment should be used to transfer 10 mL of sodium hydroxide from a graduated cylinder into a beaker?

• Funnel

• Scoopula/spatula

• Watch glass

• Crucible

This equipment may be used to hold boiling water.

• Graduated cylinder

• Beaker

• Crucible

• Watch glass

We are completing a lab and need to know the temperature and density (which requires us to know mass and volume) of a substance. Which of the following equipment should we use?

• Graduated cylinder and watch glass

• Beaker and balance

• Beaker and ring stand

• Graduated cylinder and balance

Which of the following is the correct way to dilute acid with water?

• Add water to acid and then add more acid

• Add acid to water

• Add water to acid

• Add them together in a clean, unused beaker

The image is a

• Clamp

• Tongs

• Ring stand

• Beaker

Which of the following is an example of a proper laboratory practice/technique?

• Brody immerses a hot beaker into cold water.

• Naomi and Meghan go to the restroom and leave a lit Bunsen burner unattended.

• Stephen mixes two liquids together that is not stated in the procedure of the lab.

• Garrett uses tong to move a hot beaker off a hot plate.

Goggles are worn in the laboratory

• To avoid eye strain

• To improve your vision

• Only if you don’t have corrective glasses

• Any time chemicals, heat or glassware are used

A student is going to dissolve 50 g sodium chloride in water for an experiment. Which piece of equipment would she not use?

• Bunsen burner

• Graduated cylinder

• Beaker

• Stirring rod