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Calculati concentratia procentuala a unei solutii obtinute prin dizolvarea a 10 g substanta in 140 g apa

Răspuns :

md=10g
m apa=140g
c%=?

ms=md+m apa⇒ms=10+140=150g
c%=md*ms/100=10*150/100=15%
md=10g
m apa=140g
c%=?

ms=md+m apa⇒ms=10+140=150g
c%=md·ms÷100=10·150÷100=15%