Đáp án:
Giải thích các bước giải:
`a.`
`Al(III),SO_4(II)⇒Al_2(SO_4)_3`
`PTK=27.2+3(32+16.4)=342(dvC)`
`b.`
`Fe(III),NO_3(I)⇒Fe(NO_3)_3`
`PTK=56+3(14+16.3)=242(dvC)`
`c.`
`Mg(II),Cl(I)⇒MgCl_2`
`PTK=24+35,5.2=95(dvC)`
`d.`
`C(IV),O(II)⇒CO_2`
`PTK=12+16.2=44(dvC)`
`e.`
`Ba(II),PO_4(III)⇒Ba_3(PO_4)_2`
`PTK=137.3+2(31+16.4)=601(dvC)`
`f.`
`Ca(II),Br(I)⇒CaBr_2`
`PTK=40+80.2=200(dvC)`
`g.`
`K(I),CO_3(II)⇒K_2CO_3`
`PTK=39.2+12+16.3=138(dvC)`
Xin hay nhất!!!