Lab Techniques & Safety: Crash Course Chemistry #21

Book 2 - Safety & Equipment in the LaboratoryJanuary 28, 2019 9:22 PM

Unit 1 - Science Skills + Safety Page 1

Unit 1 - Science Skills + Safety Page 2

Unit 1 - Science Skills + Safety Page 3

Unit 1 - Science Skills + Safety Page 4

Unit 1 - Science Skills + Safety Page 5

Unit 1 - Science Skills + Safety Page 6

Unit 1 - Science Skills + Safety Page 7

Unit 1 - Science Skills + Safety Page 8

Classwork Today...if you don't finish, it is HOMEWORK:

Safety Poster should be completed and handed in1.

Bunsen Burner worksheet completed and handed in2.

Finish all assignments & worksheet in "BOOK 2" (blue book)…quiz on Friday (book is DUE)

3.

Unit 1 - Science Skills + Safety Page 9

Erlenmeyer FlaskHolding liquidsShape avoids loss due to splashing-Common sizes include 125, 250 and 500 mL-

DropperUsed to transfer small quantities of liquids

Test tube holderHolding hot test tubesUsed for heating test tubes over a flame-Used for removing test tubes from hot water baths

Safety glassesUsed to protect eyes from chemicals and broken glass due to heating

Fluted funnelFunneling liquidsUseful for pouring liquids through small openings-Can contain filter paper for separating solids from suspension by filtration

BeakerHolding liquidsMay be graduated (sometimes in two directions)-May have a white spot for labeling-Various sizes including 125, 250 and 500 mL

ScoopulaMoving samples of solidsSometimes called a spatula-Should NOT be used as a stirring rod (stirring rods should be glass)

Bunsen BurnerUsed to heat substances to high temperatures in the lab. Can reach temperatures up to 1400°C…be careful!

Unit 1 - Science Skills + Safety Page 10

Test tubeHolding liquids or solidsCan be heated directly or in a water bath-May be used to mix small quantities of chemicals-Large variety of sizes-

ThermometerMeasuring temperaturesBulb should be submerged in the liquid being measured-Temperature ranges vary -Unit usually degrees Celsius (oC)-

Wash bottleUsed to rinse various pieces of lab glassware such as test tubes and flasks

Watch glassHolding or coveringUseful for holding a sample of chemical-May cover a beaker or flask to prevent evaporation-Holds chemicals while drying

Electronic balanceUsed to measure mass Typically in grams (g)-

Graduated cylinderMeasuring volumes of liquidsSizes vary-Commonly 10, 25, 50, 100 mL-

Stirring rodUsed to mix chemicals and liquids

Test tube rackUsed to hold test tubes during a lab experiment

Unit 1 - Science Skills + Safety Page 11

In lab experiments, hot plates are used to heat glassware or its contents.

HOT PLATE

BUNSEN BURNER

TEST TUBE HOLDER/TONGS

(DISPOSEABLE)PIPETTE

EVAPORATING DISH

PETRI DISH

SPOT PLATE

FORCEPS

STOCK BOTTLE

Used to quickly heat substances to high temperatures in the lab. Creates a very hot flame from a mixture of gas and air

Used for holding test tubes while heating over a flameUsed for removing HOT test tubes from hot water baths

Used for measuring a small volume of liquids & release in dropsAccurate because of measured lines (graduations)

Used for evaporating liquid to leave a solid product behindCeramic material allows it to be heated to very high temperatures

A small glass or plastic pan with lidUsed for experimenting or holding samples during a lab

A laboratory tool made either from ceramics or plasticsMade of many depressions where only small amount of reactants can be added at a time.

Used to pick up and hold small itemsMade of metal or plasticAlso called tweezers

A container made of glass or plasticContain chemicals in liquid or powder form for laboratories

Unit 1 - Science Skills + Safety Page 21

Unit 1 - Science Skills + Safety Page 12

Answers

Unit 1 - Science Skills + Safety Page 13

ANSWERS

Unit 1 - Science Skills + Safety Page 14

2.

2. Health Hazard: will cause a risk to a person's health if exposed to. Respiratory danger (inhalation)

Unit 1 - Science Skills + Safety Page 15