Problem: You choose to investigate some of the solubility guidelines for two ions not listed in the table below, the chromate ion (CrO42 -  and the oxalate ion (C2O42-).You are given 0.01 M solutions (A, B, C, D) of four water-soluble salts:SolutionSoluteColor of SolutionANa2CrO4YellowB(NH4)2C2O4ColorlessCAgNO3ColorlessDCaCl2ColorlessWhen these solutions are mixed, the following observations are made:Experiment NumberSolutions MixedResult1A+BNo precipitate, yellow solution2A+CRed precipitate forms3A+DYellow precipitate forms4B+CWhite precipitate forms5B+DWhite precipitate forms6C+DWhite precipitate formsWrite a net ionic equation for the reaction that occurs and identify the precipitate formed, if any, in the experiment 2.

FREE Expert Solution

We have to write a net ionic equation for the reaction that occurs in experiment 2 and identify the precipitate formed.


A precipitate is an insoluble compound that forms when solutions of two soluble compounds are mixed.


Experiment 2 is the mixing of solutions A and C that results in the formation of a red precipitate.

Solution A: Na2CrO4

Solution C: AgNO3


When these substances react, the cations and anions will exchange. The NO3- ion will change cation from Ag+ to Na+ and CrO42- will change cation from Na+ to Ag+.

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Problem Details
You choose to investigate some of the solubility guidelines for two ions not listed in the table below, the chromate ion (CrO42 -  and the oxalate ion (C2O42-).

Table 4.1 gives solubility guidelines for common ionic compounds in water and lists any important exceptions.

You are given 0.01 M solutions (A, B, C, D) of four water-soluble salts:


SolutionSoluteColor of Solution
ANa2CrO4Yellow
B(NH4)2C2O4Colorless
CAgNO3Colorless
DCaCl2Colorless


When these solutions are mixed, the following observations are made:


Experiment NumberSolutions MixedResult
1A+BNo precipitate, yellow solution
2A+CRed precipitate forms
3A+DYellow precipitate forms
4B+CWhite precipitate forms
5B+DWhite precipitate forms
6C+DWhite precipitate forms


Write a net ionic equation for the reaction that occurs and identify the precipitate formed, if any, in the experiment 2.

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