Question

0.05 litri solutie 0.6M NaOH se amesteca cu 250 ml apa distilata.Care va fi ph-ul solutieo obtinute? Multumesc anticipat

Answer 1

C = n/Vs ⇒ n = 0,05×0,6 = 0,03 moli NaOH

Vsf = Vs + VH₂O = 0,05+0,25 = 0,3 L

C = n/Vs = 0,03/0,3 = 0,1 M

NaOH - B.T ⇒ [NaOH] = C = [OH] = 10⁻¹ M

pOH = -lg[OH⁻] = -lg 10⁻¹ = 1

pH + pOH = 14 ⇒ pH = 13