Chem question

2010-10-14 6:25 am
Why the mg ribbon cannot be ignited by burning match?

回答 (1)

2010-10-14 6:51 am
✔ 最佳答案
simply because temperature of burning match isn't high enough to ignite the magnesium ribbon.

at least 500 degree for a period of time is needed, while match may not be able to reach such a temperature. also, the duration of burning of a match is short, while ignition of magnesium ribbon in non-luminous flame of Bunsen flame may still need 5~10 seconds.



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