Chemistry, Unit 1: Revision (6)

Percentage yield:

PY = actual yield/theoretical yield x 100

  1. Calculate no. of moles (n = m/GFM)
  2. Calculate mass (m = n x GFM)
  3. Use % yield equation

Atom economy:

AE = mass of desired products/total mass of reactants x 100


Avogadro & the Mole: 

“6.02 x 10^23”

  1. Calculate no. of moles
  2. Multiply no. of moles by ‘6.02 x 10^23’

Volumetric Titration:

To measure concentration:

  1. Calculate no. of moles (n = m/GFM)
  2. Concentration = n/v

Analysis - Chromotography:

Mobile phase - liquid or gas

Stationary phase - paper, silica gel etc.

To measure Rf value:

  • Rf = distance traveled by component/distance traveled by solvent