Question

HNO2 + CaCO3 = H2CO3 + Ca(NO2)

Can someone please balance this equation?!?!

Answer 1

Balanced equation

So we see from inspection that H is not balanced. And by balancing H we have to add 2(NO2) and 2H

So the balanced equation is;

2HNO2 + CaCO3 = H2CO3 + Ca(NO2)2

Any questions feel free to ask.