Question

6. Using the example of calcium chloride explain how the formulae of compounds are derived
(given that the valency of calcium is 2 and that of chlorine is 1).
​

Answer 1

Answer:

By cross multiplying

Explanation:

Write the valence of both Calcium and Chlorine on top.. Ca = 2 and Cl = 1

Now cross multiply ..

so you will get CaCl2

Hope it helps

Answer 2

hey mate, its easy to derive any compound's formula by just seeing the its valency. So here is ur answer,

• first write the symbol of each element and their valencies respectively in below of them, i.e

                              Ca    Cl

                               2       1

• now, u have to just write the valency of each element with the symbol of opposite element, it is just like cross-multiplying in maths, i.e

                               Ca1Cl2

          [note as I was not having the down nos. I wrote the valencies without and bolding, from this u must understand that these are written lower than the element's symbol]

it took a lot of efforts to explain u..

hope it helps

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