Jakie będzie stężenie procentowe roztworu jeżeli do 250g roztworu 18%-owego dosypiemy 45g substancji?
Dane:
Szukane:
mr1 = 250g
C1 = 18%
C2 = ?
ms1 = ?
ms2 = 45g + ms1
mr2 = 250g + ms1
Obliczenia:
C1 = ms1/mr1 x 100%
18% = ms1/250g x 100%
ms1 = 45g
ms2 = 45g + 45g = 90g
mr2 = 250g + 45g = 295g
C2 = 90g/295g x 100% = 30,5%
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Dane:
mr1 = 250g
C1 = 18%
Szukane:
C2 = ?
ms1 = ?
ms2 = 45g + ms1
mr2 = 250g + ms1
Obliczenia:
C1 = ms1/mr1 x 100%
18% = ms1/250g x 100%
ms1 = 45g
ms2 = 45g + 45g = 90g
mr2 = 250g + 45g = 295g
C2 = 90g/295g x 100% = 30,5%