Question

O solutie de acid clorhidric contine 1,2 kg apa si are concentratia procentuala de 32%.Cat acid clorhidric s-a dizolvat?

Pls...va rog mult
Repedeee

Answer 1

m.apa = 1,2 kg , c = 32%

stim ca c = mdx100/ms si ca ms = md + m.apa

undemd o notam cu a

=> 32 = ax100/a+1,2

=> 32(a+1,2) = 100a

=> a = 0,565 kg HCl

 

facem proba

=>ms = m.apa + md = 1,765 kg sol

md = 0,565 kg

=> c = mdx100/ms

= 0,565x100/1,765 = 32% deci se probeaza