About chemical question

Metal: K > Na > Ca > Mg > Al > Zn > Fe > Pb > Cu > Hg> Ag> Au
Ions: K+< Na2+< Ca2+< Mg2+< Al3+< Zn2+< Fe2+,3+< Pb2+< Cu2+< Hg< Ag+
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1) adding magnesium to lead(Ⅱ)nitrate solution 會唔會有reaction?
Ans: yes
Metal: K > Na > Ca > Mg > Al > Zn > Fe > Pb > Cu > Hg> Ag> Au
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Ions: K+< Na2+< Ca2+< Mg2+< Al3+< Zn2+< Fe2+,3+< Pb2+< Cu2+< Hg< Ag+
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2) adding lead to manesium nitrate solution 會唔會有reaction?
Ans: No

Metal: K > Na > Ca > Mg > Al > Zn > Fe > Pb > Cu > Hg> Ag> Au
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Ions: K+< Na2+< Ca2+< Mg2+< Al3+< Zn2+< Fe2+,3+< Pb2+< Cu2+< Hg< Ag+

2006-12-08 20:37:24 補充：
magnesium to lead(Ⅱ)nitrate solution Mg(s) + Pb(NO3)2 (aq) -----> Pb(s) + Mg(NO3)2 (aq)Observations:1. magnesium metal dissolved2. a grey solid is coated on magnesium 3. the colour of solution does not change

adding magnesium to lead(Ⅱ)nitrate solution 會唔會有reaction?

Yes, magnesium nitrate and lead would be formed.

adding lead to manesium nitrate solution 會唔會有reaction?

NO. Nothing happen.