Question

chemicals formula (i)calcim(ll)phosphate. (ii) mercury (ll)chloride

Answer 1

I)Ca3(PO4)2.
2)HgCl2.

Answer 2

Explanation:

In calcium(ll) phosphate, charge on calcium is 2 positive and charge on phosphate is 3 negative.

This means that 3 molecules of calcium react with 2 molecules of phosphate to give calcium(ll) phosphate. The reaction will be as follows.

          $3Ca^{2+} + 2PO^{3-}_{4} \rightarrow Ca_{3}(PO_{4})_{2}$

Therefore, the chemical formula of calcium(ll) phosphate is $Ca_{3}(PO_{4})_{2}$.

In mercury (ll)chloride, charge on mercury is 2 positive and charge on chloride is negative one.

This means that one molecule of mercury reacts with 2 molecules of chlorine to give mercury (ll)chloride. The reaction will be as follows.

            $Hg^{2+} + 2Cl^{-} \rightarrow HgCl_{2}$

Therefore, the chemical formula of mercury (ll)chloride is $HgCl_{2}$.