Required Practical P1

Question 1

Équipement for making soluable salt

Answer 1

• Bunsen burner
• tripod
• gauze
• beaker
• dilute sulphuric acid (limiting)

Question 2

Soluable salts practical

Answer 2

• heat dilute sulphuric acid on set up until almost boiling
• add amounts of copper oxide and stir w a glass rod
• solution will turn blue and keep adding when powder remains showing acid is now in excess
• filter out unreacted copper oxide using filtration
• take the copper sulphate solution and heat it in an evaporating dish over a beaker
• take out and leave in a cool place for crystals to form
• take out crystals and pat dry

Question 3

How to do electrolysis

Answer 3

• put about 50cm of the Aqueous solution in the liquid
• put a pétri dish over w two holes for the electrodes
• put electrodes clipped to a power pack ag around 4v

Question 4

Rules for elevtrokysis

Answer 4

At anode- halogen is discharged and if no halogen it’s always OH-
At cathode- always H+ unless it’s something less reactive than hydrogen eg copper

Question 5

Temp change practical

Answer 5

• measure 30cm of hydrochloric acid
• answer this to a cup
• put cup in beaker
• add a thermometer to record temp of acid
• measure 5cm of sodium hydroxide and add to polastyrine cup
• add lid to top of beaker cup thing
• stir solution with thermometer
• measure highest temp reached
• REPEAT WHOLE using 5cm more of sodium hydroxide until 40cm
• REAPEAT AGAIN for two sets of results

Question 6

Point of temp change practical

Answer 6

• it’s an endothermic reaction so energu and temp increases as there is more sodium hydroxide solution