Question

1 oblicz ile gramów wodorotlenku sodu potrzeba do przygotowania 1,5 dm sześciennych 20 % roztworu o d= 1,22 d/cm 3

Answer 1

d = 1,22g/cm3
V = 1,5dm3 = 1500cm3

m = dV

m = 1500cm3 * 1,22g/cm3 = 1830g

cp = 20%
mr = 1830g

ms = mr*cp/100%

ms = 1830g*20%/100% = 366g