Then, whatever gas that is, why is it released slowly at first, then becomes rapid? What is the purpose for obtaining the melting point experimentally, and what info does it give us about the purity of the product?
Replace itThe sparks are a problemremoving the plate did not solve the problem but made it worseDo yourself a favor and replace it before you regret it.
H2(g) First the KOH(aq) must get through the protective coating of Al2O3 on the foil, then start reacting with the AlA melting point close to the published value indicates purityImpurities usually lower the melting point.
