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12 questions from this quiz
Safe to drink
7 (neutral)
pH probe or universal indicator paper
Presence of dissolved salts or minerals
Evaporate water & check for solid residue
No solid residue
Separate pure water from impurities
Conical flask
They are left behind in the flask
Cools vapour to condense it to liquid
Allow time to cool before touching
Repeat pH & dissolved solids tests
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