Required Practicals Paper 1 Chemistry

Required Practical 1 Simple Distillation

Analysis and purification of water samples from different sources

Apparatus

• Bunsen burner
• Condenser
• Beaker
• Water samples
• pH probe/indicator
• Bung
• Themometer

Method

• Place the indicator into the water sample and place in the conical flask using the diagram to set up.
• As the water travels through the condenser, the cold water around it cools it to liquid state.
• This will collect in the beaker leaving behind the soluable mass.

Risks

Wear eye protection

Variables

Independant - The water samples tested

Dependant - N/A

Controls - N/A

Required Practical 2 Titration

Detremination of the reacting volume of a strong acid and strong alkali

Apparatus

• Conical Flask
• Burette
• Pipette and pipette filler
• Methyl Orange
• Soduim Hydroxide solution
• Sulfuric acid solution
• White tile
• Clamp stand

Method

• Wash ans rinse the pipette with the alkali used and fill it up using the pipette filler to 25cm3.
• Use pipette to fill 25cm3 of sodium hydorxide into a conical flask with the indicator. Place on a white tile under the burette on a clamp stand.
• Fill the burette using a funnel with acid to 0cm3 mark.
• Slowly allow the acid to dribble opening the tap, swirling continuously.
• Look for a permenant colour change from yellow to red. When this starts slow the acid down.
• Calculate the chnage in volume of acid and repeate three times making a mean.
• You can calculate the concentration of the acid from these results.

Risks

Wear eye protection

Variables

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