Displacement reactions..hurry

2009-05-09 12:38 am

1) When nickel is heated with copper (II) oxide, nickel oxide and copper are formed.

a. which of the two metals is more reactive?

b. what other experiments could you do to check on this?

2) Which of the following mixtures would you expect to react when heated? Give products for those which react.

a. zinc and copper (II) oxide
b. zinc and lithium oxide
c. copper and iron (III) oxide
d. magnesium and calcium oxide
e. lithium and calcium oxide
f. iron and lead (II) oxide

回答 (1)

老爺子

2009-05-09 2:37 am

✔ 最佳答案

1)
a)
Nickel is more reactive.

b)
Put a piece of nickel into copper(II) sulphate solution. Displacement occurs to give green nickel(II) ion and reddish brown copper metal.

Alternative answer:
Put separately each of a piece of nickel and a piece of copper into 2 cm3 of dilute hydrochloric acid. Nickel reacts slowly with dilute hydrochloric to give colourless bubbles of hydrogen, but copper gives no reaction.

2)
a.
react
The products are zinc oxide and copper.

b.
not react

c.
not react

d.
not react

e.
lithium oxide and calcium

f.
iron(III) oxide and lead
=

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