F.4Chem問題

1 係吾係所有insoluble in water ge metal salt 喺acid道都會dissolve?
吾係
如果吾係有邊D先會dissolve?
活性序高於其酸根离子的化合物
参考氧化环原或置換反应

1.Nope.
It is base on the anion of the parent acid (for example:H2SO4->SO4(2-)
when you add PbSO4 into Nitric Acid , according to the principle of reaction,
PbSO4(s)+2HNO3(aq)->Pb(NO3)2(aq)+H2SO4(aq)
^according to the reaction,mixture of Lead (II) nitrate and sulfuric acid aqeuous
solution will formed.
Since Lead(II)sulphate and sulphuric acid share same anion,(Suppose)no reaction
will take place.
2.Ba(NO3)2(aq)+H2SO4(aq)出BaSO4(s)+2HNO3(aq)
No.(I Guess its about electro-negativity(ability to attract electron) of the anion)
I search the experiment and the barium sulphate didnt re-dissolve .Its just sink to
bottom.