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mrozt.1 = 200g
C%rozt.1 = 20%
mrozt.2 = 100g
C%rozt.2 = 10%
Obliczyc:
C%rozt.3 = ?
C%rozt3 = masa substancji rozpuszczonej(ms)/masa roztworu(mrozt) x 100%
msub1 =c% x mrozt : 100%
msub1 =20% x 200g : 100% = 40g
msub2 = 10% x 100g : 100% = 10g
C%rozt3 = 40g+10g/200g+100g x 100% = 50g/300g x 100% = 16,6%
w przybiżeniu 17%