Class Test T1

Question 1

Goggles

Answer 1

The most important lab apparatus used to protect the eye from glass, chemicals, and flames

Question 2

Stirring Rod

Answer 2

For stirring in lab

Question 3

Beaker

Answer 3

Used to measure liquid not accurately, May be heated and used to hold and mix chemicals

Question 4

Erlenmayer Flask

Answer 4

Used to measure liquid not accurately, may be heated and used to mix chemicals and used in titration.

Question 5

Bunsen burner

Answer 5

Used for heating in lab

Question 6

Lighting a Bunsen Burner

Answer 6

1. Put safety glasses on
2. Put the bunsen burner on the top of the heatproof matt.
3. Check the rubber hose for any splits and cracks.
4. Twist the 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 turning on the gas.

Question 7

Test tube

Answer 7

May be heated, used to mix and hold small amount of chemicals.

Question 8

Graduated cylinder

Answer 8

Used to measure volumes of liquid accurately

Question 9

Reading the volume of liquid using graduated

cylinder

Answer 9

Measure the liquid from the bottom of the meniscus.

Read it exactly straight from the side, not below or above.

Question 10

Matter

Answer 10

Matter is anything that has mass and takes up space, including solid, liquid, and gas.

Question 11

Particle Theory of Matter

Answer 11

Matter has particles that has space between, the space depends on which state of matter. The particles are always moving, and heat (energy) makes it move faster.
Solid’s particles are in fixed position and vibrating. Liquid’s particles are irregular and are able to l]slide past each other and move around. Gas’s particles are moving in all direction.

Question 12

Compresssibility.

Answer 12

Solid has fixed shape and volume, so it’s incompressible. Liquid doesn’t, so it’s almost compressible. Gas also doesn’t, so it’s very compressible.

Question 13

Changing states 1

Answer 13

Melting is when solid changes to liquid, and freezing is when liquid changes to solid. The melting and freezing point is 0 celcius.

Question 14

Changing states 2

Answer 14

Boiling and evaporating is when liquid changes to gas. Boiling point is 100 celcius. Condensation is when gas changes to liquid, and sublimation is when solid, changes to gas.