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A kind of nickel ion distinguishes the method for sodium carbonate and sodium bicarbonate solution

A technology of sodium bicarbonate and sodium carbonate, which is applied in the fields of chemistry, chemical engineering, pharmacy, and medical treatment. It can solve the problems of inability to identify sodium carbonate and sodium bicarbonate solution, calcium ion turbidity or even precipitation, and achieve individuality, obvious phenomenon, The effect of strong reliability

Inactive Publication Date: 2021-03-02
GUANGZHOU COLLEGE OF TECH BUSINESS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, although the dissociated carbonate ions of sodium bicarbonate in aqueous solution are few, they are enough to produce turbidity or even precipitation with calcium ions. Practice has proved that it is impossible to distinguish sodium carbonate and sodium bicarbonate solutions with the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take two small test tubes, add 0.5mL 0.02mol / L sodium carbonate to one test tube, add 0.5mL saturated (1.04mol / L) sodium bicarbonate solution to the other test tube; add 5 Shake fully after dropping 0.005mol / L nickel nitrate solution. The sodium carbonate solution appears white turbidity, and the sodium bicarbonate solution is difficult to observe the phenomenon change.

Embodiment 2

[0015] Take two small test tubes, add 0.5mL 0.05mol / L sodium carbonate solution to one test tube, add 0.5mL 0.8mol / L sodium bicarbonate solution to the other test tube; add 5 drops of 0.005mol sodium bicarbonate solution to the two small test tubes respectively / L nickel nitrate solution and fully shake. Sodium carbonate solution appears white turbidity, and sodium bicarbonate solution shows no change.

Embodiment 3

[0017] Take two small test tubes, add 0.5mL 0.1mol / L sodium carbonate solution to one test tube, add 0.5mL 0.5mol / L sodium bicarbonate solution to the other test tube; add 5 drops of 0.005mol sodium bicarbonate solution to the two small test tubes respectively / L nickel nitrate solution and fully shake. A pale yellow precipitate appeared in the sodium carbonate solution, but there was no change in the sodium bicarbonate solution.

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PUM

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Abstract

The invention discloses a method for identifying sodium carbonate and sodium bicarbonate solutions by nickel ions. The method of the present invention is to add dropwise nickel nitrate solution respectively in sodium carbonate and sodium bicarbonate solution, the results show that white or yellow-green turbidity or precipitation occurs in the sodium carbonate solution, but no phenomenon is observed in the sodium bicarbonate solution. The method of the present invention effectively solves the problem of rapid identification of both colorless and transparent sodium carbonate and sodium bicarbonate solutions, can better provide services for production, life, scientific research and teaching, and has simple equipment, convenient operation, and easy access to medicines. Yes, the phenomenon is obvious, the security is strong, and the effect is very good.

Description

technical field [0001] The invention belongs to the technical fields of chemistry, chemical industry, medical treatment and pharmacy, and specifically relates to a nickel ion (Ni 2+ ) method for directly identifying sodium carbonate and sodium bicarbonate solutions. Background technique [0002] There are two types of carbonates: normal salt and acid salt. Generally, normal salt is difficult to dissolve in water, while acid salt is easy to dissolve in water. It is used to explain the formation principle of natural landscapes such as caves, stalactites and stalagmites. Affected by this principle explanation, people naturally think of using calcium chloride solution to identify sodium carbonate and sodium bicarbonate solutions. In fact, this method is not feasible, because even if the sodium bicarbonate solution with a very dilute concentration of 0.01mol / L is mixed with a calcium chloride solution of 0.01mol / L, there will be turbidity. See: ①Liu Di, Li Datang. Cannot use Ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/82G09B23/24
CPCG01N21/78G01N21/82G09B23/24
Inventor 李大塘李伶辉邓望
Owner GUANGZHOU COLLEGE OF TECH BUSINESS CO LTD
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