Required Practical: Analysis & Purification of Water Samples (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Potable water meaning
Potable water meaning
Water that is safe to drink
pH of pure water
pH of pure water
7 (neutral)
Tools to measure water pH
Tools to measure water pH
pH probe or universal indicator paper
Residue from evaporated pure water
Residue from evaporated pure water
None (no solid residue)
Purpose of distillation
Purpose of distillation
Separate pure water from dissolved solids & impurities
Distillation apparatus (4 components)
Distillation apparatus (4 components)
Conical flask, delivery tube, condenser, receiving beaker
Fate of dissolved solids in distillation
Fate of dissolved solids in distillation
Left behind in flask when water evaporates
pH after distillation
pH after distillation
Close to 7
Residue after evaporating distilled water
Residue after evaporating distilled water
None (indicates pure water)
How to test for dissolved solids
How to test for dissolved solids
Evaporate water in basin, weigh for residue
Precaution for hot apparatus
Precaution for hot apparatus
Allow to cool before touching
Sources of error in water purification practical
Sources of error in water purification practical
Contamination of samples, water loss during distillation
Purpose of pH testing in water analysis
Purpose of pH testing in water analysis
Check acidity or alkalinity of water
Purpose of dissolved solids test
Purpose of dissolved solids test
Check for dissolved salts or minerals in water
Result of distillation
Result of distillation
Water free of impurities