Помогите!!!!!!!!!!!!!!!!!!!

Question

Помогите!!!!!!!!!!!!!!!!!!!

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Answer 1

1. 3MgO+2H3PO4= Mg3(PO4)2+3H2O
2. 2Cr2O3+ 6HNO3= 2Cr(NO3)3+3H2O
3. CO2+2NaOH= Na2CO3+H2O
4. H2SO4+KOH= KHSO4+H2O
5. Fe2(SO4)3+6KOH= 2Fe(OH)3+3K2SO4
6. Cu(NO3)2+Mg = Mg(NO3)2+Cu
7. там в условии опечатка 
Fe2(SO4)3+3Ba(NO3)2=2Fe(NO3)3+3Ba2(SO4)3