Common Lab Procedures

Question 1

How do you move the test tube to heat it and why?

Answer 1

You move it back and forth above the flame so it doesn’t heat too fast.

Question 2

Do you point the test tube around or away from others?

Answer 2

You point away from others.

Question 3

How do you heat the test tube and why?

Answer 3

You heat it gently because you do not want it to boil over.

Question 4

What do you never do with a thermometer?
(2 answers)

Answer 4

You never shake it down or never stir with it.

Question 5

How do you hold the thermometer in a beaker and why?

Answer 5

You hold it in the middle of the liquid because if you put it on the side of the beaker it will get the temperature of the glass and not the liquid and also there’s a chance that it could fall over.

Question 6

How do you draw the odor to your nose?

Answer 6

You would do wafting.

Question 7

How do you measure the volume of liquids

Answer 7

You measure it in Liters.

Question 8

What two things can you use with a bulb

Answer 8

You can use a graduated cylinder or a pipette.

Question 9

What’s something you CAN’T use with a bulb?

Answer 9

You can’t use a beaker.

Question 10

What is a meniscus and how do you read with a meniscus?

Answer 10

A meniscus is a curve on the surface of a molecular substance when it touches another material and you read from the bottom of the meniscus.

Question 11

How do you read it at?

Answer 11

You read it at eye level.

Question 12

What is the safest way to transfer liquids?

Answer 12

Lip to lip

Question 13

What do you pour down?

Answer 13

A stirring rod.

Question 14

What does A to W mean (really important)

Answer 14

Acid to water.

Question 15

How do you find mass and what measure does it use?

Answer 15

You find mass with a balance and it measures with grams.

Question 16

How do you carry a balance?

Answer 16

You carry it by the base.

Question 17

How do you make sure it’s at zero balance? (3 things)

Answer 17

By setting all the weights to zero, making sure the line lines up, and if it doesn’t adjust the knob at the end. (teacher will have to adjust the knob.)

Question 18

What do you do before putting chemicals on the balance?

Answer 18

Put the weighing paper down.

Question 19

Which side does the unknown go?

Answer 19

The left side.

Question 20

How do you balance it by?

Answer 20

You balance it by adjusting the scale with nothing on it to zero.

Question 21

When you are transferring solids, if you get it from a container, what do you use to get it out?

Answer 21

A chemical spatula.

Question 22

What don’t you do for different chemicals?

Answer 22

You don’t use the same spatula.

Question 23

What do and don’t you do with the extra chemicals?

Answer 23

You put it to the side and don’t put it back in the container.

Question 24

With weighing paper, how do you put the chemicals where you need them?

Answer 24

You fold it like a taco and then pour down the fold.

Question 25

What do you never put in the sink when turning it on?

Answer 25

You never put anything glass in the sink while turning it on.

Question 26

How do you turn on the sink? (2 answers)

Answer 26

You turn it on slowly and only turn a minimal amount.

Question 27

When you are getting set up, what is the order in which you do it? (3 steps)

Answer 27

1. you get your glasses / goggles.
2. Get aprons if needed.
3. Get trays / materials.

Question 28

What steps do you take to clean up? (6 steps)

Answer 28

1. Turn everything off.
2. Dispose of chemicals as directed.
3. Wash all equipment and put back on the trays like you found it.
4. Wipe down your table.
5. Put away goggles.
6. Wash hands.