Balancing equations                                                              

1       MgO                    +        2HNO3                 à     Mg(NO3)2             +        H2O              

2       Ca(OH)2               +        H2SO4                   à     CaSO4                  +        2H2O            

3       2Na                      +        2HCl                     à     2NaCl                   +        H2                 

4       SrCO3                   +        2HNO3                 à     Sr(NO3)2               +        H2O             +        CO2

5       Al                         +        H3PO4                  à     AlPO4                   +        1.5 H2                    

6       2Ga(OH)3             +        3H2SO4                à     Ga2(SO4)3             +        6H2O            

7       Al2(CO3)3              +        6HNO3                 à     2Al(NO3)3             +        3H2O           +        3CO2

8       Ga2(CO3)3             +        3H2SO4                à     Ga2(SO4)3             +        3H2O           +        3CO2