Sodium Carbonate – Primary Standard for Acid/Base Titrometry
Primary Standard for standardisation of acid titrant solutions. Twice recrystallised, anhydrous sodium carbonate of extraordinary purity.
Chemical formula: Na2CO3
Appearance and odour: snow white amorphous powder, without appreciable odour
Grade: 99.95 % (acidometric assay)
Molar Mass: 105.9885 g/mole
Amount: 25 g
Packaging: professional wide necked, white HDPE bottle with blue conical seal cap and tamper ring. Labelled. Bottle and cap are UN approved and reusable.
Description and uses:
To prepare Primary Standard solutions for standardising acid titrant solutions.
250.0 ml of a 0.1 N (equivalent/L) sodium carbonate Standard Solution requires approximately 1.3248 g to weighed accurately to 0.1 mg (best) or 1 mg (acceptable) and transferred into a 250.0 ml calibrated volumetric flask. Adding water to completely dissolve the primary standard, then filling the flask to the 250 ml mark yields a solution of exactly known Normality.
If the precisely weighed amount was m then the titer t of the solution is t = m / 1.3248.
A 10.0, 20.0 or 25.0 ml sample of this solution is then titrated (repeatedly) against the acid solution to be standardised, using an appropriate end-point indicator or potentiometric determination of end-point. For strong acids Methyl Orange solution is the recommended indicator, changing from yellow to orange at end point.
This product comes with an instructions leaflet which is available on request (contact us).
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