Chemistry SA

Question 1

Goggles

Answer 1

Googles are the most important lab equipment, used to protect eyes from broken glass, chemicals, and flames.

Question 2

Stirring Rod

Answer 2

A stirring rod is used to stir chemicals in the lab.

Question 3

Beaker

Answer 3

A beaker is used to measure liquids (not very accurately), hold chemicals, mix chemicals, and may be heated.

Question 4

Erlenmeyer Flask

Answer 4

An Erlenmeyer flask is used to measure liquids (not very accurately), mix chemicals, and may be heated. It is also used in titration.

Question 5

Test Tube

Answer 5

A test tube is used to hold small amounts of chemicals, mix chemicals, and may be heated.

Question 6

Graduated Cylinder

Answer 6

A graduated cylinder is used to measure volume of liquids very accurately.

Question 7

How To Read The Volume Of A Liquid In A Graduated Cylinder

Answer 7

1. Always measure volume in a graduated cylinder at the bottom of the meniscus.
2. Always look straight from the side of the meniscus at the graduated cylinder to measure the volume.

Question 8

Bunsen Burner

Answer 8

A bunsen burner is an important piece of lab equipment used for heating in the lab.

Question 9

Parts of a Bunsen Burner

Answer 9

1. Barrel
2. Collar
3. Air Hole
4. Gas Valve
5. Base

Question 10

Barrel

Answer 10

A barrel is the part where the flame comes out.

Question 11

Collar

Answer 11

A collar is the part to open or close the air hole.

Question 12

Air Hole

Answer 12

An air hole is the part that allows air to enter the bunsen burner.

Question 13

Gas Valve

Answer 13

A gas valve is the part to control the height of the flame.

Question 14

Base

Answer 14

A base is the part to support the burner if you need to carry/move it.

Question 15

Yellow Flame

Answer 15

1. Safety Flame
2. Relatively cool
3. Highly Visible
4. Air holes closed
5. Dirty Flame

Question 16

Blue Flame

Answer 16

1. Heating Flame
2. Relatively hot
3. Hard to see
4. Air holes open
5. Clean Flame

Question 17

How To Light A Bunsen Burner

Answer 17

1. Put on safety glasses
2. Place Bunsen Burner in Heatproof Mat
3. Check Rubber Hose for cracks and splits
4. Twist rubber hose onto the gas outlet
5. Make sure the Bunsen burner hole on the collar is closed.
6. Get Matches and light one, hold match over the top
   of the Bunsen Burner while you turn the gas on.
7. Now the Bunsen Burner should be going.

Question 18

Matter

Answer 18

Something that has mass and takes up space.

Question 19

States of Matter

Answer 19

A physical form of matter, which includes solid, liquid, and gas.

Question 20

Change of State

Answer 20

Change of substance from one physical state to another.

Question 21

Solid

Answer 21

Solid is a state of matter that has its own fixed shape, and its particles vibrate in its place and has a fixed shape.

Question 22

Liquid

Answer 22

Liquid is a state of matter that doesn’t have its own shape, and its particles are irregular and can slide past each other.

Question 23

Gas

Answer 23

Gas is a state of matter that doesn’t have its own shape, and its particles are irregular and move freely in all directions.

Question 24

Particle Theory of Matter

Answer 24

1. All matter is made up of tiny particles.
2. The particles have spaces between them
3. The particles of matter are always moving
   (attracted each other).
4. Adding heat to matter makes the particles move faster.

Question 25

Materials

Answer 25

Materials are the different types of matter things are made of, like wood, plastic, cotton, glass, rubber, and metal.

Question 26

Element

Answer 26

An element is a substance that cannot be split into anything simpler. There are 92 types of elements found naturally on Earth.

Question 27

Location of Elements in the Periodic Table

Answer 27

In the Periodic Table, metals are on the left and non-metals are on the right.

Question 28

Physical Properties of Metal

Answer 28

State and appearance, sonority, conduction of heat and electricity, strength, hardness, high density, flexibility, malleability, and ductility.

Question 29

Gold

Answer 29

Gold is a shiny, yellow metal. It is malleable and ductile, and stays shiny in air and water.

Question 30

Iron

Answer 30

Iron is a shiny, grey metal. Worldwide, we use more iron than any other metal. Iron is used because when mixed with small amounts of other elements, it's strong and malleable. It's also cheap compared to other metals.

Question 31

Physical Properties of Non-Metal

Answer 31

Low melting and boiling point, not shiny, brittle.

Question 32

Alloy

Answer 32

A mixture of metals, that sometimes include a non-metal element.

Question 33

Material Properties

Answer 33

Strength, stiffness, flexibility, brittleness, hardness, conducting heat and electricity, and water absorption.

Question 34

Polymers

Answer 34

Polymers are substances that have very long particles. Synthetic polymers include Polyethene, Poly(propene), and PVC. Natural polymers are made by plants and animals, like cotton, silk, wool, and wood.