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7 (a) Silicon dioxide has a very high melting point - AQA - GCSE Chemistry - Question 7 - 2014 - Paper 1
Question 7
7 (a) Silicon dioxide has a very high melting point. Other substances are added to silicon dioxide to make glass. Glass melts at a lower temperature than silicon dio... show full transcript
Worked Solution & Example Answer:7 (a) Silicon dioxide has a very high melting point - AQA - GCSE Chemistry - Question 7 - 2014 - Paper 1
Step 1
Suggest why glass melts at a lower temperature than silicon dioxide.
Answer
The addition of other substances to silicon dioxide results in weaker bonds or fewer forces within the structure. These weaker interactions require less energy to overcome, allowing the glass to melt at a lower temperature.
Step 3
Step 4