CHEM LAB EQUIPMENT

Question 1

Porcelain crucible

Answer 1

-A small container that allows for substances to be heated, melted, or burned at very high temperatures

Question 2

Volumetric flask

Answer 2

-Used to measure the accurate volumes of liquids
-USED TO MAKE SOLUTIONS

-LOOK: A round bottom with a long, very skinny neck

Question 3

Crucible tongs

Answer 3

Used to grab and move hot crucibles after they have been heated

-LOOK: THIN PINCHING TONGS

Question 4

Graduated Cylinder

Answer 4

Used to measure the volumes of different liquids

-TALL AND THIN

Question 5

Glass beaker

Answer 5

-To hold/mix liquids/chemicals
-Sometimes heating

-FAT AND WIDE

Question 6

Erlenmeyer flask

Answer 6

-Used to heat, cool, store, and mix liquids

-ESPECIALLY HEAT

-PYRAMID SHAPED WITH A NECK

Question 7

Beaker tongs

Answer 7

-Used to move a beaker safely

-THICKER PINCERS

Question 8

Evaporating dish

Answer 8

-Used to evaporate liquids and solutions so a solid substance is left
-Storage of chemicals

Question 9

Pipeclay triangle

Answer 9

-Used to hold crucibles when being heated by a flame

Question 10

Bunsen burner

Answer 10

-Provides a single flame to safely heat/sterilize objects/solutions

Question 11

Florence Flask

Answer 11

-Used as a vessel for heating liquids (BOILING!!!!) and for distillation

-VERY ROUND BOTTOM AND A NECK

Question 12

Wire gauze

Answer 12

-Diffuses heat so glass lab equipment does not become damaged when it is being heated
-Supports a beaker/flask when heating

Question 13

Test tube holder/clamp

Answer 13

-Used to help handle and move test tubes in a safe manner

Question 14

Ring clamp/Iron Ring

Answer 14

-Used to support things being heated on a bunsen burner

-LOOKS LIKE A MAGNIFYING GLASS

Question 15

Conversion rule

Answer 15

-LARGER LEFT: If the factor gets larger move it to the left

-If the factor gets smaller move it to the right

-Move the decimal the difference in the exponent

Question 16

When reading lab equipment you must always…

Answer 16

-ONLY GUESS ONE TIME

Question 17

COUNTING SIG FIGS

Answer 17

-If a decimal point is present, start from the left and start counting at the first non-zero

-If the decimal point is ABSENT start from the right

Question 18

Addition/subtraction rule for sig figs

Answer 18

-Your answer must have the same number of DECIMALS as the lowest amount in the work

Question 19

Mukt/division rule for sig figs

Answer 19

-Your answer must have the same number of sig figs as the lowest amount in the work

Question 20

Precision

Answer 20

-How close your measurements are to each other

Question 21

Accuracy

Answer 21

-How close you are to your target

Question 22

Qualitative Data

Answer 22

-Gives a quality

Ex. Its red, its round, its smooth

Question 23

Quantitative data

Answer 23

-Gives a number

Ex. It is 95 degrees out

Question 24

Observation

Answer 24

Something one of your five senses tells you
-Cannot be wrong

Question 25

Inference

Answer 25

-A conclusion that you draw based on observations

Question 26

Percent error formula

Answer 26

answer- correct answer / correct answer x 100

Question 27

Graphing

Answer 27

1. Label x and y axis w units
2. TITLE
3. Use 3/4 of the graph
4. Appropriate scale
5. Lines

Question 28

Line of best fit

Answer 28

-Goes through or comes close to as many points as possible

Question 29

Density

Answer 29

-A measurement of how close particles are to eachother