oblicz stężenie procentowe roztworu otrzymanego przez dodanie 5g substancji do 150g roztworu 20% na teraz !!!
Cp= 20%
m(r)= 150g
m(s)=?
Cp=[m(s)x100%] / m(r)
m(s)= [Cp x m(r)] / 100%
m(s) = 20% x 150g / 100% = 30g
m(s2) = ms + 5g= 30g + 5g = 35g
m(r2) = mr + 5g = 150g + 5g= 155g
Cp2 = [m(s2)x100%] / m(r2)
Cp2= 35g x100% / 155g = 22,58%
Po dodaniu 5g substancji, stezenie roztworu wyniesie 22.58%
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Cp= 20%
m(r)= 150g
m(s)=?
Cp=[m(s)x100%] / m(r)
m(s)= [Cp x m(r)] / 100%
m(s) = 20% x 150g / 100% = 30g
m(s2) = ms + 5g= 30g + 5g = 35g
m(r2) = mr + 5g = 150g + 5g= 155g
Cp2 = [m(s2)x100%] / m(r2)
Cp2= 35g x100% / 155g = 22,58%
Po dodaniu 5g substancji, stezenie roztworu wyniesie 22.58%