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Submitted by NikolaM on Sun, 12/15/2013 - 19:56
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Zasicen rastvor kuhinjske soli sadri 28% NaCl.Iz 1kg % NaCl ispari 980g vode.Hvalaa :)

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milicaradenkovic - Sun, 12/15/2013 - 20:12

mr=1 kg ispari 980 g vode i ostane ms=10 g a m(vode)=10 g

10 g:x=72:28

x=28*10/72=3.89 g NaCl

28% NaCl je 28 g soli u 100 g rastvora 

m(vode0=100-28=72 g

m(NaCl koji se istalozio)=10-3.89=6.11 g

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NikolaM - Sun, 12/15/2013 - 20:17

Sta predtavlja 72 a sta 28? :)

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milicaradenkovic - Sun, 12/15/2013 - 20:20

72 jesu grami vode a 28 grami NaCl

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NikolaM - Sun, 12/15/2013 - 20:21

A kako se to dobijaa

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milicaradenkovic - Sun, 12/15/2013 - 20:25

Napisala sam ti u prvom komentaru 28% rastvor je 28 g NaCl u 100 g rastvora

m(vode)=100-m(NaCl)=100-28=72 g