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Saturday 30th July 2016
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Can you make water?


My five-year-old daughter asked me: Can you make water? And I didn't know the answer. But I know you can help.
Colin, Kingston


** Definitive **
Name: Jeff
Answer: If you burn hydrogen in the air (or any hydrocarbon) it combines with oxygen to make water. As water is just H20, it's just hydrogen combining with oxygen.

** Definitive - understandable for a five-year-old **
Name: Max, Ealing
Qualification: Studied chemistry
Answer: The product of every combustion is water and carbon dioxide. Hence, you get water from the exhaust of a car.

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