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cp1=10%
ms1= 10g*10%/100%=1g
mr2=20g
cp2=2,5%
ms2=20g*2,5%/100%=0,5g
mr3=20+10=30g
ms3=0,5g+1g=1,5g
cp3=1,5*100%/30g=5%
Odp.stęzenie nowego roztworu wynosi 5%
mr1 - masa roztworu - 10g
Cp - stężenie procentowe - 10 %
ms1 - masa substancji - 10g * 10% = 10g * 0,1 = 1g
roztwór 2
mr2 - 20g
cp - 2,5%
ms2 - 20g * 2,5% = 20g * 0,025 = 0,5g
mr1 + mr2 = 10g + 20 g = 30g
ms1 + ms2 = 1g + 0,5g = 1,5g
Cp = 1,5 / 30 * 100% = 150 / 30 = 5%