SAL Report Template
Investigation of the Acid-Base Properties of Salt Solutions
Name:
Partner(s) name:
Date Submitted:
TA Name:
Purpose:
Procedure:
1
Copyright © 2016 by the Department of Chemistry and Biochemistry, The Ohio State University
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Copyright © 2017 by the Department of Chemistry and Biochemistry, The Ohio State University
Presentation of Data
Part A: How does the appearance of the pH indicator change?
Data Table 1. Appearance of pH indicator.
Appearance of solutions
Low pH High pH
Indicator color change with HCl
Indicator color change with NaOH
Part B: Do aqueous cations affect the pH?
Data Table 2. Investigation of Cations (Add additional rows as necessary)
Salt
Observations
Multiple Choice: Based on the pH you observed, what happened?
NaCl
A. Na+(aq) + H2O NaH + OH-
B. Na+(aq) + H2O NaOH + H+
C. Na+(aq) + H2O N.R.
FeCl3
A. Fe3+ + 6H2O [Fe(H2O)5H]4+ + OH-
B. [Fe(H2O)6]3+ + H2O [Fe(H2O)5(OH)]2+ + H3O+
C. Fe3+ + 6H2O N.R.
(other salts)
(use the above examples to determine
Data Table 3. Data Analysis of Cations
List examples from your investigation
What do each group of cations have in common?
Cations that are neutral
Cations that are acids
Cations that are bases
Part C: Do aqueous anions affect the pH?
Data Table 4. Investigation of Anions (Add additional rows as necessary)
Salt
Observations
Based on the pH you observed, what happened?
Data Table 5. Data Analysis of Anions
List examples from your investigation
What do each group of anions have in common? Be thorough in your analysis.
Anions that are neutral
Anions that are acids
Anions that are bases
Additional Report Requirements (see rubric)
Discussion (including summary of methods, major results and all points to consider):
Conclusion (as rubric) :
Report Questions:
Substance
Acidic, basic, or neutral?
Why?
RbCl
LiCl
C5H6N+Cl
C5H5N is the weak base pyridine
K2S
KNO3
Sodium benzoate
K3PO4
NaCN