Question

Qualitative Cation Tests

Peter Jeschofnig, Ph.D. Version 42-0194-00-01

Lab Report Assistant                                                                                            

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment

Answer 1

1) Al^+3(aq) + 3OH^-1(aq) --> Al(OH)^3(s)
Ca^2 +(aq) + 2OH^-(aq) --> Ca(OH)2(s)
Cu^2 +(aq) + 2OH^-(aq) --> Cu(OH)2(s)
Ag^+(aq) + Cl^-(aq) --> AgCl(s)
Fe^3+(aq) + 2OH^-(aq) --> Fe(OH)3(s)
Pb^2+(aq) + 2Cl^-(aq) --> PbCl2(s)
Zn^2+(aq) + 2OH^-(aq) --> Zn(OH)2(s

2) This would be Ag^+.

3) Pb^2+

4) Al(NO3)3 and Zn(NO3)2

5) Ca(NO3)2 and Cu(NO3)3

6) Cu^2+ is the cation here

7) Fe^3+, Zn^2+, Pb^2+, Ca^2+, Al^3+

8) Simply add HCl. Silver will precipitate and copper will not.