1. Prepare a solution of impure NaHCO, by weighing 1 Og of the impure salt into a
100ml besker. Add 50ml of distilled water and stir to dissolve
2. Pour the resulting solution into a 100ml volumetric flask and make up to mark
with distilled water Shake vigorously to mix
3. Rinse your burette with Sml of standardized HCl solution and clap it to a reton
stand. Fill the burette with the standardized HCl solution ensuring the meniscus is
at the zero mark
Pipette 25ml of the prepared impure NaHCO, solution into a 250ml conical flask
Add 3 drops of methyl rod indicator
Place the conical flask on a white plain paper and run the acid gently from the
burette into the conical flask. Continue the sitration carefully until the colour
changes from purple to yellow
Record the burette reading in your work book.
Repeat the titration twice from step 4 to 6 ensuring that your burette reading (titre
value) is within the accuracy of 0.3ml.
Puestion
Write the equation of reaction for the above experiment
Calculate the concentration of impure NaHCO, in g/dm
Calculate the Molarity of NaHCO,
Calculate the number of moles and mass of NaHCO,
Calculate the % purity of NaHCO, in the impure salt