Question

In 200g de apa se pun 40 g zahar . Concentratia solutiei este de ...

Answer 1

$m_{apa}=200g \\ m_{d}=40g \\ C=? \\ ------ \\ Rezolvare: \\ m_{s}= m_{d}+ m_{apa}=40g+200g=240g. \\ \\ C= \frac{ m_{d}*100 }{ m_{s} }= \frac{40g*100}{240g}= 16,66$
(%).