Question

9. How metal reacts with
a. oxygen
b. water
c. Acids​

Answer 1

Answer:

When a metal reacts with oxygen, a metal oxide forms. The general equation for this reaction is: metal + oxygen → metal oxide. Rust is a form of iron oxide and it forms slowly when iron is exposed to air.

In general the reactions of metals with water produce hydrogen gas (H 2 ) and the hydroxides of the metals. Metals with moderate to low reactivity react very slowly with water. However, they react moderately with steam when heated and give hydrogen gas and metal oxides.

When an acid reacts with metal, a salt and hydrogen are produced: acid + metal → salt + hydrogen An example: nitric acid + calcium → calcium nitrate + hydrogen The salt that is produced depends upon which acid and which metal react.

Answer 2

Answer:

9.

a.   When a metal reacts with oxygen, a metal oxide forms. The general equation for this reaction is: metal + oxygen = metal oxide.

b.  When a metal reacts with water metal hydroxide and hydrogen,  forms.

c.  When an acid reacts with metal, a salt and hydrogen are produced.

The general equation for this reaction is: acid + metal = salt + hydrogen.

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