Required Practical: Analysis & Purification of Water Samples (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does the term 'potable' mean when referring to water?
What does the term 'potable' mean when referring to water?
Safe to drink
What pH should pure water have?
What pH should pure water have?
7 (neutral)
Which equipment can be used to measure the pH of a water sample?
Which equipment can be used to measure the pH of a water sample?
pH probe or universal indicator paper
What should remain after pure water evaporates from an evaporating basin?
What should remain after pure water evaporates from an evaporating basin?
No solid residue
What is weighed to test for dissolved solids in water?
What is weighed to test for dissolved solids in water?
An evaporating basin
What is the purpose of distillation in this practical?
What is the purpose of distillation in this practical?
Separate pure water from impurities
Which piece of equipment cools water vapour back into liquid during distillation?
Which piece of equipment cools water vapour back into liquid during distillation?
Condenser
What happens to dissolved solids during distillation?
What happens to dissolved solids during distillation?
They remain in the conical flask
What pH is expected for distilled water after purification?
What pH is expected for distilled water after purification?
Close to 7
What precaution prevents burns from hot apparatus?
What precaution prevents burns from hot apparatus?
Allow apparatus time to cool
What should you do if acidic or alkaline water contacts your skin?
What should you do if acidic or alkaline water contacts your skin?
Rinse off skin; wear eye protection
Which is a source of error in this practical?
Which is a source of error in this practical?
Contamination of water samples