Volumetric Problems (Leaving Cert Chemistry): Flashcards

Concentration of unknown solution using titration data

$V_a \times M_a / n_a = V_b \times M_b / n_b$

$V_a \times M_a = V_b \times M_b$

Volume of acid (cm³)

Molarity of acid (mol/L)

Number of moles of acid from balanced equation

Reduces experimental error and gives more accurate results

Identify unknown, write balanced equation, list given data

1:2 ratio (one Na₂CO₃ to two HCl)

1:1 ratio

Multiply calculated concentration by dilution factor

mol/L or g/L