Question

Transformati concentratia procentuala a unei solutii in concentratie molara cunoscand densitatea solutiei

Answer 1

md/ms × 100 = c%
(md: M) / (ms: ro) = c molar

Answer 2

 

c/100= md/ms   ==:> ms= 100md/c%   (1)

cM=n/Vs=(md/M) / (ms/ ρ)= md* ρ /M*ms  ==> ms=md* ρ /cM*M   (2)

se egaleaza (1) cu (2)

100md/c%   = md* ρ /cM*M    ==>

cM= c% *  ρ / 100*M