Question

o solutie de acid clorhidric are concentratia de 35% si densitatea 1,18g/cm3. Determinati cantitatea de acid clorhidric pur din 500 cm3 solutie

Answer 1

$Datele \: problemei: \\ \\ c = 35 \: \% \\ \\ s = 1,18 \: g/cm {}^{3} \\ \\ V = 500 \: cm {}^{3} \\ \\ ms \: HCI = {?} \\ \\ md \: HCI = {?} \\ \\ Rezolvare: \\ \\ c = \frac{md \times 100}{ms} = > md = \frac{ms \times c}{100} \\ \\ S= \frac{m}{V} = > ms = \frac{S}{V} = 1,18 \times 500 = 590 \: g \\ \\ md = \frac{590 \times 35}{100} = 206,5 \: g \: HCI$