nBaCl2 1M = 0.5 x 1 = 0.5 (mol)
nBaCl2 2.5M = 2.5 x 0.5 = 1.25 (mol)
nBaCl2 sau khi trộn: 0.5 + 1.25 = 1.75 (mol)
Vdd sau khi trộn: 500ml + 500ml = 1000ml = 1l
CMdd sau khi trộn: 1.75/1 = 1.75 M
nBaCl2 (1)= 0.5 mol
nBaCl2 (2)= 1.25mol
nBaCl2 (1,2)= 1.75mol
VBaCl2 (1,2)= 0.5+0.5=1l
CM BaCl2= 1.75/1=1.75M