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Friday, May 6, 2016

Soap Is Covalent

We have first,

Na+H2ONaH+OH

then

Na+OHNaOH

where the unpaired orbit of O in OH pairs up up the unpaired orbit in Na.  This is because OH must come from somewhere first.  The formation of NaH is necessary to provide for OH.  Water, H2O is not a ready mix of H+ and OH.  Thus, preventing the formation of NaH stops Na from reacting with H2O.

Where's the gas?  Either,

2NaH2Na+H2

where two NaH gives up their H to give H2 or

NaH+H2ONa+H2+OH

where water contribute one of the H to form H2.  OH is not a charged radical.  Both reaction suggest that Na is catalytic in extracting H2 from the solvent if not for the formation of the hydride, NaH.  Furthermore,

Na+OHNaOH

where the unpaired orbit in Na pairs up with the unpaired orbit in O, makes NaOH covalent!  NaOH is organic.  Which is good news for those who have not used soap yet.

NaOH is like water, H2O but has one of the H replaced by an alkaline metal, Na.

Note:  It is not just the overall reactions but the sequence by with the reactions proceed that matters here.

What?  NaH is too reactive to remain in water?  Yes evetually, only NaOH with H2 remain in the system.