Required Practical: Analysis & Purification of Water Samples (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
13 cards from this deck
What does potable water mean?
What does potable water mean?
Safe to drink
pH of pure water
pH of pure water
7 (neutral)
Equipment for pH testing
Equipment for pH testing
pH probe or universal indicator paper
Expected residue after evaporating pure water
Expected residue after evaporating pure water
No solid residue
Equipment to test for dissolved solids
Equipment to test for dissolved solids
Evaporating basin and balance
Purpose of distillation in water purification
Purpose of distillation in water purification
Separate pure water from dissolved solids & impurities
Key distillation apparatus components
Key distillation apparatus components
Conical flask, delivery tube, condenser, receiving beaker
Expected result of distilled water
Expected result of distilled water
Free of impurities
pH of distilled water
pH of distilled water
Close to 7
Fate of dissolved solids in distillation
Fate of dissolved solids in distillation
Left behind in conical flask when water evaporates
Hazard from hot apparatus
Hazard from hot apparatus
Burns
Precaution for acidic/alkaline water samples
Precaution for acidic/alkaline water samples
Rinse skin if contact; wear eye protection
Possible errors in distillation
Possible errors in distillation
Contamination of samples or loss of water during process