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Calculati echivalentul gram pentru H2C2O4 x 2H2O

Răspuns :

MH2C2O4x2H2O=2AH+2AC+4AO+2(2AH+AO)=2*1+2*12+4*16+2(2*1+16)=2+24+64+36=126g/mol

Manhidru=90g/mol

Eg=M/2=126/2=63g H2C2O4x2H2O

Fara apa(anhidru)

Eg=M/2=90/2=45g H2C2O4