Question

calculati concentratia procentuala a unei solutii optinute prin dizolvarea a 300 grame de sare in 800 grame apa

Answer 1

Formula concentratiei procentuale:

$C= \frac{md}{ms}*100$

unde md reprezinta substanta dizolvata iar ms masa de solutie exprimata ca:

$ms=md+m_{apa}$

Deci:

md=300g sare       ms=300+800=1100g saramura

$C= \frac{300}{1100} *100=27,27$%