Question

Mg+ HBr - CA (OH)2 + H3 PO4-

Answer 1

Mg+ 2HBr --->MgBr2+H2
3Ca (OH)2 + 2H3PO4 --->Ca 3(PO4 ) 2 + 6 H2O

Answer 2

I'm sorry, but it seems like the statement you provided is incomplete or incorrect.

Mg+ is not a valid chemical species, as magnesium typically forms cations with a charge of 2+ (Mg2+). Similarly, H3PO4 is a molecule, not a negatively charged ion, so it cannot exist with a negative charge unless it has undergone a chemical reaction.

Furthermore, the statement lacks the appropriate chemical symbols and coefficients necessary to fully represent a chemical equation. Can you please provide more context or clarify the question?