Experimental Precedures

Question 1

Why can carbon dioxide be collected over water

Answer 1

Is relatively insoluble

Question 2

Why can a crucible be heated

Answer 2

Reactants are not flammable

Question 3

Beaker

Answer 3

Used to hold liquids and have a non accurate scale

Question 4

Conical flask

Answer 4

Used during titration and for filtering non accurate scale

Question 5

Burette

Answer 5

Has very accurate scale

Question 6

Pipette

Answer 6

Can only measure set volume of liquid

Question 7

Filter funnel

Answer 7

Used to separate liquids and solids

Question 8

Evaporating dish

Answer 8

Used to heat water and evaporate from salt solutions

Question 9

Standard flask

Answer 9

Only measure one volume of liquid used to make standard solution

Question 10

Delivery tube

Answer 10

Used to deliver gas to a reaction often bubbled through water

Question 11

Hot plate

Answer 11

Electronic way of heating up liquid good for flammable liquids

Question 12

Bunsen burner

Answer 12

Flames and should not be used with flammable liquids

Question 13

Electronic balances

Answer 13

Used to weigh massive solids either take the balance or use weighing boat

Question 14

Always read from

Answer 14

Bottom of meniscus

Question 15

Distillation

Answer 15

Distillation is a process by which miscible liquids are separated based on boiling points

Question 16

What is the profess of distillation

Answer 16

• heating mixture of liquids until the one with the lower melting point starts to boil
• the gas is passed into a condenser where it condenses back to liquid and is collected
  -once first component is collected temp will rise until next component boils

Question 17

Enthalpy of combustion experiment

Answer 17

1- temp of water at start
2- weigh fuel at start
3- burn fuel /put it out
4- measure max temp of water
5 - weigh fuel

Question 18

Standard solution

Answer 18

1- weigh the mass of solute
2- dissolve in small volume of deionised water in beaker
3 - pour into standard flask
4- rinse beaker and stir several times
5- top up to line
6 - mix

Question 19

Weighing by difference

Answer 19

1- Tare
2- weigh beaker
3- add required mass and subtract mass of beaker from it