Question

what is the formula of magnesium
phosphate​

Answer 1

Formula of Magnesium phosphate is Mg₂(PO₄)₂.

We can also find this formula with the help of cross - multiplication method.

Step 1: first of all write the name of the compound whose formula you've to find.

Here, the compound is Magnesium phosphate.

Step 2: Then write the chemical formula or symbol of the elements or compounds.

Magnesium ⇒ Mg

Phosphate ⇒ (PO₄)₂

$\fbox{\bold{Note:}}$

Phosphate formula is (PO₄)₂ and not PO₄. As phosphate is a poly - atomic compound made up of phosphorus and oxygen. (talking after the cross - multiplication method)

It should be written in brackets wherever, the valency is more than 2. If the valency is 1, then the brackets aren't needed.

Step 3: Below each element or compound, write its valency.

Magnesium valency ⇒2 + ⇒Mg²⁺

Phosphate valency ⇒ 1 - ⇒PO₄¹⁻

Step 4: Just cross multiply the valency and the symbols.

By using the above steps we can find the formula of Magnesium phosphate.

Magnesium phosphate

      Mg               PO4

        2+                1-

By cross - multiplying each other, we obtain,

Mg(PO₄)₂

$\fbox{\bold{Note:}}$

1. If the valency is 1, then we don't need to write it in the obtained formula.

2. The element name should be written first and then later the compound's name.

This way we can get the required formula of any compounds.

Answer 2

Answer:

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Explanation: