Ionic Reactions

Ionic Reactions

Peter Jeschofnig, Ph.D. Version 42-0163-00-01

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

Data Table: Solubility Rules Table

Negative Ion (Anions) Positive Ions (Cations) Solubility of

Compounds

All negative ions are with

Alkali (Li+, Na+, K+, Rb+, Cs+)

Soluble

All negative ions are with

Hydrogen Ion (H+) Soluble

All negative ions are with Ammonium ion *NH4+) Soluble

Nitrate NO3- ions are with All Soluble

Acetate CH COO- ions are

3

with All except Ag+ Soluble

Chloride, Cl-

Bromide Br-

Iodide I- Low solubility

Sulfate SO 2-

4 Low solubility

Sulfide S -

2 Low solubility

Hydroxide, OH- Low solubility

Phosphate PO 3-

4

Carbonate CO 2-

3

Sulfite, SO 2-

3 Low solubility

Questions

A. Compare your results with the solubility rules and/or solubility table in your chemistry text.

B. Do your results agree with your expectations from the solubility rules/table?

Yes, I believe my results followed solubility rules

C. Which anions generally form precipitates? What are exceptions?

Most of the metal oxides and hydroxides formed the precipitates. The exceptions were the alkali metals and barium.

D. Which anions generally do not form precipitates? What are the exceptions?

Nitrates, alkali metals,...