Method for identifying sodium bicarbonate and sodium carbonate solutions by using phenolphthalein-alcohol solution

Method for identifying sodium bicarbonate and sodium carbonate solutions by using phenolphthalein-alcohol solution

  • CN 106,370,650 A
  • Filed: 09/26/2016
  • Published: 02/01/2017
  • Est. Priority Date: 09/26/2016
  • Status: Active Application
First Claim
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1. a kind of phenolphthalein-alcoholic solution differentiates sodium bicarbonate and the method for sodium carbonate liquor it is characterised in that comprising the steps:

  • (1) take two small test tubes, be separately added into sodium bicarbonate, sodium carbonate liquor;

    (2) add phenolphthalein-alcoholic solution that mass fraction is 0.05% respectively in two small test tubes, phenolphthalein-alcoholic solution passes throughVolumetric concentration be 50% ethanol solution in add appropriate phenolphthalein to obtain, consumption be the determined liquid of 2ml in plus phenolphthalein-ethanolSolution 0.03 ~ 0.04ml, sodium bicarbonate solution can not make colourless phenolphthalein show redness, is still in colourless;

    And sodium carbonate liquor energyColourless phenolphthalein is made to show redness.

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