GCSE Chemistry AQA C8 Chemical Analysis (Paper 2 -
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GCSE Chemistry AQA C8 Chemical Analysis (Paper 2 - Triple) Rated A+ 
1. What is the definition of a pure substance? 
Answer: A pure substance is a substance that contains only one compound or element throughout. 
2. How can you determine the purity of a substance? 
Answer: You can determine the purity of a substance by measuring its melting and boiling points and 
comparing it with data from a book. The impurer a substance, the lower its melting point and higher its 
boiling point. 
3. Wh...
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GCSE Chemistry AQA C8 Chemical Analysis (Paper 2 -•GCSE Chemistry AQA C8 Chemical Analysis (Paper 2 -
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GCSE Chemistry AQA C8 Chemical Analysis (Paper 2 - Triple) Rated A+ 
1. What is the definition of a pure substance? 
Answer: A pure substance is a substance that contains only one compound or element throughout. 
2. How can you determine the purity of a substance? 
Answer: You can determine the purity of a substance by measuring its melting and boiling points and 
comparing it with data from a book. The impurer a substance, the lower its melting point and higher its 
boiling point. 
3. Wh...