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Se amesteca 200g de NaOH 20% (p=1,225 g/cm^3) cu 36,74 mL apa 

  3.3 punctul C.



Se Amesteca 200g De NaOH 20 P1225 Gcm3 Cu 3674 ML Apa 33 Punctul C class=

Răspuns :

c%=md/ms * 100=>md=ms * c/100 = 40 g
ms2=ms1+m apa = 200 + 36,74 g (ro apa = 1g/cm cub)=236,74 g
c%=40/236,74 * 100=16,896 %
cM=(c * ro * 10)/ masa molara NaOH
cM=(16,896 * 12,25 * 10)/40 =>cM=5,17445 mol/litru