lead react very slowly with cold con.NaOH to make H2 (Pb + NaOH + 2H2O → Na[Pb(OH)3] + H2) but hot trihydroxoplumbate(II) ion is unstable in hot
aqueous solutions. is it possible that melted NaOH will not react with Pb because of passivation. maybe even with liquid lead. i dont have pure lead, only Pb solder.
otherwise I'd try running an experiment. can anyone help me with this situation.