Question

Daca o solutie de acid azotic are concentratia 0,1 M si densitatea de 1,069g/cm^3, care este concentratia procentuala a acesteia?​

Answer 1

stim ca

Cm = md/miuxVs = md/miux1000 ml

=> md = Cmxmiux1000

c% = mdx100/ms

ro = ms/Vs => ms = roxVs

=> md = roxc%xVs/100

md = md =>

Cmxmiux1000 = roxc%xVs/100

Cmxmiux100 = roxc%x1000

=> Cm = roxc%x10/miu

=> c% = miuxCm/10ro

miu.HNO3 = 63 g/mol

=> c% = 63x0,1/10x1,069

= 0,6%