Q4 of 152 Page 18

Why should magnesium ribbon be cleaned before burning in air?

It should be cleaned to remove protective layer of basic magnesium carbonate from the surface of the ribbon before burning.

More from this chapter

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2 On what basis is a chemical equation balanced? 3 What happens chemically when quicklime is added to water filled in a bucket? 5 State whether the following statement is true or false:

A chemical equation can be balanced easily by altering the formula of a reactant or product.

 6 What is wrong with the following chemical equation?

Mg + 0 MgO


Correct and balance it.