The test to identify three white solids NaCl , KCl and MgCl 2 should be determined. Concept introduction: Metal cations can be separated into two groups by the precipitation of metal sulfide. The cations which form very insoluble sulfides can be separated from cations which form soluble sulfides. The separation takes place in an acidic solution and uses solubility equilibrium. The separation depends on the H 3 O + concentration so that the reaction quotient Q c exceeds K spa for insoluble sulfides but not for soluble sulfide. As a result, insoluble sulfides precipitate under acidic condition but soluble sulfides remain in solution. Qualitative analysis identifies ions present in an unknown solution. The ions are identified by chemical tests. In the scheme of analysis, some 20 metal cations are separated into five groups by selective precipitation. The flowchart that shows the separation of metal cations in qualitative analysis is as follows:

Question

Want to see the full answer?

Answer 1

Question

Chapter 17, Problem 17.138SP

Interpretation Introduction

Interpretation:

The test to identify three white solids NaCl, KCl and MgCl2 should be determined.

Concept introduction:

Metal cations can be separated into two groups by the precipitation of metal sulfide. The cations which form very insoluble sulfides can be separated from cations which form soluble sulfides. The separation takes place in an acidic solution and uses solubility equilibrium.

The separation depends on the H3O+ concentration so that the reaction quotient Qc exceeds Kspa for insoluble sulfides but not for soluble sulfide. As a result, insoluble sulfides precipitate under acidic condition but soluble sulfides remain in solution.

Qualitative analysis identifies ions present in an unknown solution. The ions are identified by chemical tests. In the scheme of analysis, some 20 metal cations are separated into five groups by selective precipitation.

The flowchart that shows the separation of metal cations in qualitative analysis is as follows:

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

A covalent bond is the result of the a) b) c) d) e) overlap of two half-filled s orbitals overlap of a half-filled s orbital and a half-filled p orbital overlap of two half-filled p orbitals along their axes parallel overlap of two half-filled parallel p orbitals all of the above

Can the target compound at right be efficiently synthesized in good yield from the unsubstituted benzene at left? starting material target If so, draw a synthesis below. If no synthesis using reagents ALEKS recognizes is possible, check the box under the drawing area. Be sure you follow the standard ALEKS rules for submitting syntheses. + More... Note for advanced students: you may assume that you are using a large excess of benzene as your starting material. C T Add/Remove step X но

Which one of the following atoms should have the largest electron affinity? a) b) c) d) 으으 e) 1s² 2s² 2p6 3s¹ 1s² 2s² 2p5 1s² 2s² 2p 3s² 3p² 1s² 2s 2p 3s² 3p6 4s2 3ds 1s² 2s² 2p6