Question

How to do criss cross method in chemistry for potassium nitrate, barium chloride , calcium chloride and calcium oxide ?? Can u guys plz say I love u guys

Answer 1

K+ NO3-
Criss cross their valencies and we get
KNO3
Ba2+ Cl-
Criss cross their valencies and we get
BaCl2
Ca2+ Cl-
Criss cross their valencies and we get
CaCl2
Ca2+ O2-
As both have same valency, they get canceled and we get
CaO