Analysis of Brick cleaner Aim: To find the percentage by mass of hydrochloric acid present in brick cleaner by doing an acid-base titration.

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Analysis of Brick cleaner

Aim: To find the percentage by mass of hydrochloric acid present in brick cleaner by doing an acid-base titration.

Theory/Hypothesis: The main ingredient in brick cleaner is HCL and must be diluted and titrated with a base to be able to analyse it. It reacts with parts of the concrete which allows it to remove the concrete from the bricks. I think there will be around 30% of HCL in brick cleaner.

Materials:

  • 5mL brick cleaner
  • 100mL, 0.1M standard sodium carbonate solution
  • 250ml de-ionised water
  • Methyl orange indicator
  • 250mL volumetric flask
  • 4x100mL conical flasks
  • Small funnel
  • 10mL measuring cylinder
  • 20mL pipette
  • Pipette filter
  • Dropping pipette
  • Burette and stand
  • White tile
  • Electronic balance
  • Safety glasses
  • Gloves
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Method:

  1. A 250 mL volumetric flask was weighed with it’s mass recorded
  2. A 10mL measuring cylinder was used to pour 5mL brick cleaner into the volumetric flask. The flask was stoppered straight after all the brick cleaner was in the flask.
  3. The flask was then reweighed
  4. De-ionised water was added until the flask was about half full. The flask was stoppered and shaken carefully upside down several times.
  5. More water was added to the flask about a cm below the graduation line. A dropper was used to accurately drop the right amount of water to the flask ...

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