Question

Se dizolva 8g zahar in 72g apa, obtinandu-se o solutie A peste care se adauga 8g zahar rezultand solutia B.
Datele problemei!! Pls!!!​

Answer 1

Răspuns:

solutia A

m,diz= 8g

m,apa= 72g

m,sol= m,diz+m,apa= 80g

c= mdx100/ms=8x100/80=10%

solutia B

md'= mdiz+m,adugat=8+8=> 16g

m,sol'= msol+m,adaugat= 80+8=> 88g

c=md'x100/m,sol'=16x100/88=18%

Explicație: