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The table above shows the formulae of some ions. In which of these compounds is...

Chemistry
JAMB 2024

The table above shows the formulae of some ions. In which of these compounds is the formula not correct?

  • A. Aluminiumtetraoxosulphate(VI), Al\(_2\)(SO\(_4\))\(_3\)
  • B. Calciumtrioxonitrate(V), Ca(NO\(_3\))\(_2\)
  • C. Iron(III)bromide, Fe\(_3\)Br
  • D. Potassiumsulphide, K\(_2\)S
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Correct Answer: Option C
Explanation

Iron(III)bromide is the correct answer because Fe has a valency of +3 while Br has a valency of -1,

In the bid to form compounds, they bond together and exchange their valency.

⇒ Fe takes the valency of Br which is 1 while Br takes the valency of Fe which is 3.

Therefore, the formula for the compound formed should be FeBr\(_3\) and not  Fe\(_3\)Br

 

There is an explanation video available below.

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Explanation Video

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