HCl lahus
Aim of the work
The determination of the concentrations of acid and base solutions through titration.
Used compounds
HCl solution with an unknown concentration. NaOH solution with a known accurate
concentration, indicators phenolphthalein (ff/pp) and methyl red (mp/mr).
Equipment
Conical flasks (250 cm3), 2 burettes (25 cm3), pipette (10 cm3).
Procedure
A. Determining the concentration of a hydrochloric acid solution through titration
1. To determine the concentration of the acid solution take the NaOH solution with a known
concentration (the standard solution) and pour it into the burette (α in figure 2.2). See that
there are no air bubbles near the tip. Fill the burette until the 0-point of the scale.
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