Preview

Qualitative Cation Test Labpaq

Good Essays
Open Document
Open Document
468 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Qualitative Cation Test Labpaq
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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Observations

Questions

A. Write net ionic equations for all reactions that produce a precipitate. Ag+(aq.) + Cl-(aq.) ---- AgCl (s)
2 Ag+(aq.)+ 2OH- --- Ag2O (s) + H2O(l)
2 Ag+(aq.)+2NH3+ H2O(l) --- Ag2O (s)+ 2NH4+ (aq.)
Pb2+(aq.)+2Cl- (aq.) ---- PbCl2(s)
Pb2+(aq.)+2OH-(aq.) ----Pb(OH)2 (s)
Pb2+(aq.)+ 2NH3(aq.)+ H2O(l) --- Pb(OH)2 (s)+ 2NH4+ (aq.)
Cu2+(aq.) +2OH-(aq.) ---- Cu(OH)2 (s)
2Cu2+(aq.)+SO42- (aq.) +2NH3(aq.)+2 H2O(l) ----- Cu(OH)2.CuSO4(s) +2NH4+ (aq.)
Zn2+ (aq.)+ 2OH- (aq.) ---- Zn(OH)2 (s)
Zn2+ (aq.)+2NH3(aq.)+ H2O(l) --- Ag2O (s)+ 2NH4+ (aq.)
Fe3+ (aq.)+ 3OH- (aq.) ---- Fe(OH)3(s)
Fe3+ (aq.)+ 3NH3(aq.)+ 3H2O(l) --- Fe(OH)3(s)+ 3NH4+ (aq.)
Pb2+(aq.)+ CrO42-(aq.) PbCrO4(s)
2Cu2+(aq.)+[Fe(CN)6]4- (aq.) -----Cu2[Fe(CN)6] (s) Zn2+(aq.) + S2-(aq) ----- ZnS(s)
4Fe3+ (aq.)+3[Fe(CN)6]4- (aq.) ----Fe4[Fe(CN)6]3 (s)
Ca2+(aq) + ( COO)22-(aq) ----- Ca(COO)2 (s)

B. Identify the cations that precipitate with hydrochloric acid and dissolve in the presence of ammonia. Ag+

C. Identify the cations that precipitate with hydrochloric acid and do not redissolve in the presence of ammonia. Pb2+

D. Identify the cations that precipitate upon addition of

You May Also Find These Documents Helpful

  • Good Essays

    Chem Lab Project 2

    • 2646 Words
    • 6 Pages

    Part 3 an unknown salt mixture of anions and cations was identified using the same tests in Part 1 and…

    • 2646 Words
    • 6 Pages
    Good Essays
  • Satisfactory Essays

    4 05 Chemical Reactions

    • 340 Words
    • 2 Pages

    1. Write a balanced equation for each reaction observed in this lab. (10 points total, 2 points each)…

    • 340 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Lab report

    • 708 Words
    • 3 Pages

    The overall goal of experiment four was to determine the identity of unknown cations presented to the student. But in order to know the identity of these unknowns, in part 1, Ag+, Pb+, and Hg22+ were presented to the student in aqueous solutions and then precipitated through experimentation. In part 2, the same procedure was enacted to determine which substances precipitated through qualitative analysis. Solubility rules were also a major theme as solubility is important in determining whether a reaction will produce a precipitate.…

    • 708 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.…

    • 365 Words
    • 7 Pages
    Satisfactory Essays
  • Satisfactory Essays

    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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.…

    • 346 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.…

    • 738 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Lab 5 Acid Base Chemistry 2

    • 1240 Words
    • 17 Pages

    No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face.…

    • 1240 Words
    • 17 Pages
    Satisfactory Essays
  • Good Essays

    Study Guide

    • 1251 Words
    • 6 Pages

    1. How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?…

    • 1251 Words
    • 6 Pages
    Good Essays
  • Satisfactory Essays

    4.05 data observation

    • 306 Words
    • 2 Pages

    Complete a data table that includes a prediction of reaction type (single replacement, double replacement, synthesis, decomposition, or combustion), observations, and identification of reaction type for each reaction in the lab. (10 points)…

    • 306 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.…

    • 1536 Words
    • 7 Pages
    Powerful Essays
  • Good Essays

    Labpaq Scientific Method

    • 1167 Words
    • 5 Pages

    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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.…

    • 1167 Words
    • 5 Pages
    Good Essays
  • Good Essays

    1) When solid sodium hydroxide is added to water, the solution gets hot. This is an example of a(n)…

    • 472 Words
    • 3 Pages
    Good Essays
  • Good Essays

    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’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.…

    • 1249 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    Study Notes

    • 706 Words
    • 3 Pages

    4) What best describes what happens when an acid such as HCl is mixed with water?…

    • 706 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Extraction Report

    • 377 Words
    • 2 Pages

    Question 1. Presumably I have an acidic compound and a neutral compound in the mixture. The acid is represent by RCOOH. So with the NaOH added, it form the sodium salt (which is soluble in water and the neutral compound is not). RCOOH goes to RCOONa. Then I separate the layers, add HCl to the RCOONa which forms the original acid and that is what is precipitating. If I have all of the acid removed from the mixture, then the second extract contains no RCOONa and no precipitate is formed when HCl is added.…

    • 377 Words
    • 2 Pages
    Good Essays