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2014-11-01T16:23:33+02:00
Peste 300g solutue de hidroxid de sodiu concentratie 40% se adauga 300 ml solutie acid clorhidric 0,1M.
2014-11-01T17:07:44+02:00
Ms=400g
c=16%
c= \frac{md}{ms} ×100⇒16= \frac{md}{400g} ×100⇒md=64g
c= \frac{md}{ms} ×100
ms=md+ m_{apa} =64+200=264
33c=800⇒c= \frac{800}{33} =24,(24)%
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