Method for identification of sodium carbonate and sodium bicarbonate solution

A technology of sodium bicarbonate and sodium carbonate, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve problems such as inability to directly identify

Inactive Publication Date: 2008-09-03
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

[0002] Sodium carbonate is commonly known as soda ash and soda, and sodium bicarbonate is commonly known as baking soda. Both are widely used in industrial production, scientific research, daily life, food hygiene, medical care and other fields. Their solutions are colorless and transparent solutions that cannot be directly identified by naked eyes.

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  • Method for identification of sodium carbonate and sodium bicarbonate solution
  • Method for identification of sodium carbonate and sodium bicarbonate solution
  • Method for identification of sodium carbonate and sodium bicarbonate solution

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Embodiment Construction

[0011] Take prepared 2mL sodium carbonate solution and sodium bicarbonate solution with a concentration of 1mol / L, 0.05mol / L and 0.01mol / L respectively, add 2mL mercuric chloride solution with a concentration of 0.1mol / L, shake, and observe the phenomenon. The experimental results are shown in Table 1.

[0012] From the experimental phenomena shown in Table 1, it can be seen that the mixture of mercuric chloride and sodium bicarbonate solution of constant concentration also has precipitation or turbidity, so by adding saturated sodium chloride solution dropwise in mercuric chloride solution to control Hg 2+ concentration, repeat the above experiment, the experimental results are listed in Table 1, wherein, the volume of saturated sodium chloride droplets is 1mL / 30 drops, 6 drops is 0.2mL.

[0013] Table 1 Mercury chloride (with saturated sodium chloride) and different concentrations of Na 2 CO 3 and NaHCO 3 Experimental phenomenon of solution mixing

[0014]

[0015] Th...

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Abstract

The invention belongs to the field of the chemistry and chemical industry, specifically relates to a method for identifying sodium carbonate and sodium hydrogen carbonate solution. The invention provides a method for identifying sodium carbonate and sodium hydrogen carbonate solution, which is based on the prior art and is different from prior art. The method uses Cl- ion modulated HgCl2 solution to identify Na2CO3 and NaHCO3 solution at macroconcentration, Na2CO3 solution can produce red brown deposition in Na2CO3 solution after mixed with modulated HgCl2 solution, and NaHCO3 solution can not produce this phenomenon. The method has the merits of simple instrument and convenient operation, common medicine and short time consumption, obvious phenomenon which is easy to detect, high success rate and good effect.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a method for identifying sodium carbonate and sodium bicarbonate solutions. Background technique [0002] Sodium carbonate is commonly known as soda ash and soda, and sodium bicarbonate is commonly known as baking soda. Both are widely used in industrial production, scientific research, daily life, food hygiene, medical care and other fields. Their solutions are colorless and transparent solutions that cannot be directly identified by naked eyes. . As we all know, the carbonates of calcium and barium are insoluble in water, and their bicarbonates are easily soluble in water. Therefore, the identification method for the above two solutions is usually to add barium chloride dropwise to the two solutions respectively. solution or calcium chloride solution, if a white precipitate is produced, then the identified solution is a sodium carbonate s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/82
Inventor 李大塘
Owner HUNAN UNIV OF SCI & TECH
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