Mamy otrzymać 1 dm³ roztworu NaOH o stężeniu 1 mol/dm³
c mol = n / V
n NaOH = 1 mol
M NaOH = 40 g/mol
m NaOH = 40 g
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c p = 35 %
m NaOH = 40 g
c p = m s * 100 % / m r
m r = m s * 100 % / c p
m r = 40 g * 100 % / 35 % = 114,3 g
d = 1,38 g/cm³
d = m / V
V r = m / d = 114,3 g / 1,38 g/cm³ = 82,8 cm³