Question

In 100g de apa se pun 25g de zahar . Determinati concentratia solutiei.

Answer 1

$m_{s}$= $m_{d}$ + $m_{apa}$
$m_{s}$ = 100g+25g = 125g solutie
c= $\frac{m_{d} x10 0}{ m_{s} }$ = $\frac{25 x 100}{125} = \frac{2500}{125}$ =20 %

Answer 2

=  + 
 = 100g+25g = 125g solutie
c=  =  =20 %

Eu cel putin asa stiu de la bunicul meu ce a luat facultatea de chimie,anu nustiu daca asa a zis