Question

Jakie jest końcowe stężenie roztworu jeżeli do 30g 10-procentowego roztworu dolano 10g rozpuszczalnika ?

Answer 1

mr = 30g

cp = 10%

ms = mr x cp/100% = 30g x 10%/100% = 3g

 

mr₂ = 30g + 10g = 40g

ms = 3g

cp = ms/mr x 100%

cp = 3g/40g x 100% = 7,5%

 

 

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Litterarum radices amarae sunt, fructus iucundiores

 

Pozdrawiam :)