Question

Problema 1. Ce masa de soda caustica este dizolvata in 300 grame de solutie de concentratie 32%?
Problema 2. Ce masa de solutie de concentratie 15% se obtin prin dizolvarea a 30 grame zahar in apa?

Answer 1

Răspuns:

1.

ms=300g

C=32%

md=?

md=C×ms/100=300×32/100=96g

2.

md=30g

C=15%

ms=?

ms=md×100/C=30×100/15=200g