Complete the following equations:
(i) `Ca+2D_(2)O to` (ii) `Mg_(3)N_(2)+D_(2)O to`
(ii)`P_(2)O_(5)+D_(2)Oto ` (iv) `Ca_(3)P_(2) +D_(2)O to`

Explanation

(i) `Ca+2D_(2)Otounderset("Cal. deuteroxide")(Ca(OD))_(2)+D_(2)`
(ii) `Mg_(3)N_(2)+6D_(2)Oto3Mg(OD)_(2)+underset("Deutero ammonia")(2ND_(3))`
(iii) `P_(2)O_(5)+3D_(2)Otounderset("Deutero phosphoric acid")(2D_(3)PO_(4))`
(iv) `Ca_(3)P_(2)+6D_(2)Oto3Ca(OD)_(2)+underset("Deutero phosphine")(2PD_(3))`