LAB Doc 6

LAB REPORT 6 – IONIC REACTIONS

No credit will be given for this lab report if the Data section is not completely filled out.

OBJECTIVES
1. Study the nature of ionic reactions
2. Write balanced equations
3. Write net ionic equations for precipitation reactions

PROCEDURE

Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below, insert your digital photographs into the report, and submit it me electronically to the email address [e-mail].

DATA AND OBSERVATIONS (14 points)

INSERT A DIGITAL PHOTOGRAPH OF YOURSELF WITH THE 96-WELL PLATE PERFORMING ONE OF THESE TESTS. (3 points)

Chemicals Tested – Record your observations in the table below. Be as detailed as possible.

Na3PO4
NaI
Na2SO4
NaCl
NaHCO3
Na2CO3
NaOH

Co(NO3)2
Cloudy Lavender
NR
NR
NR
Cloudy Light Pink
Cloudy Light Pink
Cloudy Blue

Cu(NO3)2
Cloudy baby blue
Cloudy Rusty Yellowish-orange
NR
NR
Cloudy Pastel Blue
Cloudy Pastel Blue
Almost Pastel Blue

Fe(NO3)3
Cloudy Goldish-yellow
Rusty Orange
NR
NR
Yellowish-Gold
Yellowish-Gold
Yellowish-Gold

Ba(NO3)2
Clear Cloudy Substance
NR
Cloudy White
NR
Cloudy Almost White
Cloudy Almost White
Cloudy White

Ni(NO3)2
Cloudy Mint Green
NR
NR
NR
Hazy Clear Liquid
Hazy Clear Liquid
Cloudy with almost a mint green color

QUESTIONS (10 points)

1. Compare your results with the solubility rules. Do your results generally agree with them?
Yes, I feel like my results were comparable to the rules on the table in the chemistry text.
2. Why is water a good solvent for ionic substances?
Water is a great solvent because it has an uneven distribution of its charge on its surface. The oxygen atom holds the shared electrons more closely than the two hydrogen atoms. The partially negative dipoles of the water are attracted to positively charged components of the solute, and vice versa