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Letter 37061
Neutralizing 1/2 litre of nitric acid 70%
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What would be the best procedure to neutralize apprximately 1/2
litre of 70% nitric acid solution?What precautions need to be taken
?What neutralizer could be used?
Rick Armstrong
Researcher - Iqaluit, NU, Canada
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Slowly pour it into several litres of cold water in a glass or
plastic container. This will allow the "acid" characteristic to
become active, otherwise it's more of an "oxidising" agent than an
acid.
Then drop in a handful of marble chips (limestone, calcium carbonate
- should be plenty of waste chips from a monumental mason's yard. You
will get a gentle effervescence. If all the marble chips are
consumed, add some more. When there's no more effervescence and
there's still some marble chips present, you've neutralised all the
acid and you've got a solution of calcium nitrate instead. Pour it
down the drain.
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Bill Reynolds
consultant metallurgist
Ballarat, Victoria, Australia
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