Answers26-27 CFISD TX-Chemistry A CRScientific Methods

Scientific Methods Answers

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1
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For a particular experiment, Maria must heat water in a glass flask using a Bunsen burner. She then needs to move the flask from the burner to the lab bench. What protective equipment should she use?

A
goggles
B
a lab coat or apron
C
heatproof gloves
D
chemical protective gloves
2
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What should Maria do before she turns on the Bunsen burner to begin the experiment?

A
Place the classroom fire extinguisher next to her lab bench.
B
Inspect the Bunsen burner and gas tubing for damage.
C
Move her lab notebook and papers so they are away from the burner.
D
Remove her safety goggles so she can see the burner more clearly.
3

This picture shows students working in a chemistry laboratory. What could they do to make their lab safer?

A
Label the test tubes and plastic cups.
B
Move the fire extinguisher closer to their table.
C
Wear chemical protective gloves.
D
Reduce the clutter on the table.
E
Stand at the table instead of sitting.
F
Tie long hair back.
4

Which of these statements is most likely to be part of a safety contract?

A
Loose clothing and jewelry are permitted in the lab as long as no toxic chemicals are being used.
B
Safety goggles must be worn during all laboratory activities.
C
An emergency eyewash station should be set up next to each lab table before each lab session.
5

Which behaviors are most likely to be prohibited in a safety contract?

A
talking during the lab
B
modifying the lab procedure without the teacher's permission
C
leaving active heat sources unattended
D
calling 911 during an emergency
E
using laboratory chemicals for practical jokes or tricks
6

What steps should you take to respond to an accident?

A
Notify the teacher immediately.
B
Notify the teacher only if the accident was not your fault.
C
Immediately wash off any chemicals on skin or eyes with cool running water.
D
Remain calm and help others remain calm.
E
Pick up any broken glass and throw it in the trash.
7

What type of environment should the hydrochloric acid be stored in? Check all that apply.

A
in a beaker
B
in a cool, well-ventilated area
C
in a flask
D
in a tightly closed container
8

What is the physical state of hydrochloric acid?

A
solid
B
gas
C
liquid
9

What should a student do if the hydrochloric acid splashes in their eyes?.

A
wash eyes with soap
B
flush eyes with water
C
rinse mouth with water
10

Is hydrochloric acid soluble in water?

A
yes
B
no

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