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Na+...- Na2So4+...
Mg(OH)2+... - MgCL2+...
...+... - Cr(OH)3+...
Cr(No)3+ Cr(Oh)3 +...
2NA + H2SO4 - Na2SO4 + H2
Mg(OH)2 + 2HCl - MgCl2 + 2H2O
2Cr2(SO4)3+12NaOH=4Cr(OH)3+6Na2SO4
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2NA + H2SO4 - Na2SO4 + H2
Mg(OH)2 + 2HCl - MgCl2 + 2H2O
2Cr2(SO4)3+12NaOH=4Cr(OH)3+6Na2SO4