Metal and Reactivity

A displacement reaction will occur when...

• a more reactive metal displaces a less reactive metal from its compound.
• a less reactive metal displaces a more reactive metal from its compound

• metals are reacted together

• metals above iron react with other metals in the reactivity series

What will the products of this reaction be?

calcium + zinc nitrate --------->

• zinc nitrate + calcium

• calcium nitrate + zinc

• there will be no reaction

• zinc + calcium chloride

Which of the following will not undergo reaction?

• magnesium  + magnesium sulfate

• iron  +  magnesium sulfate

• magnesium +  iron(II) nitrate

• iron + copper(II) sulfate

• copper + iron(II) nitrate

What will be observed in the reaction below?

iron (s) + copper(II) sulfate (aq) --> copper (s) + iron(II) sulfate (aq)

• blue colour of solution fades

• solution turns green

• red brown solid forms on the surface of iron

• effervescence (bubbles of gas)

Magnesium powder is added into copper(II) nitrate solution. A red-brown solid is formed. Name the solid

Fact: A more reactive metal forms positive ions more readily.

Recall: How are positive ions formed?

• electrons are lost (oxidised)

• electrons are gained (reduced)

In other word, a more reactive metal ....................... more readily than a less reactive metal.

• loses electrons (becomes oxidised)

• gains electrons (becomes reduced)

Choose the metal that will form positive ion most readily.

• K

• Mg

• Ca

• Cu

• Na

A less reactive metal will ..................... more readily than a more reactive metal.

• receive electron (become reduced)

• lose electron (become oxidised)

Iron, Fe, is placed inside a solution of CuSO₄

Between Fe and Cu, which one will lose electron to form ion?

• Fe will lose electron to form Fe²⁺

• Cu will lost electron to form Cu²⁺