Overall, the purpose of this experiment was to
observe what occurs when you mixed a cation solution with an anion solution. By
mixing the Potassium Chromatin and the Lead Nitrate solution together it created
a new solution (2 KNO3 + PbCrO4). This new solution appeared yellow and had black
dots throughout it.
Conclusion
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Pb(NO3)2
+ K2CrO4 –à 2KNO3 +PbCrO4
When
I mixed the Lead Nitrate and Potassium Chromatin together it created a yellow precipitate.
The chemical reaction became a new balanced
chemical reaction. Below is an example:
To
begin with, I was able to figure out which solution was a cation and which
solution was an anion. A cation is a positively charged ion. A cation has fewer
electrons than protons. An anion is a negatively charged ion. An Anion has more
electrons than protons. In this experiment, Potassium is the cation and Nitrogen
is the anion.
Discussion
I
also observed that the yellow precipitate had black dots throughout it.
Weight
of filtered precipitate: 16.160g.
Describe
appearance of precipitate (did it exhibit any color?): The precipitate was
yellow.
Observations and
Results
In this experiment, I
first added 50 ml(s) of Potassium Chromate solution into a 100ml beaker. Then,
I added 50 ml(s) of Lead (II) Nitrate into the same 100ml beaker. Then, I
filtered the resulting precipitate into a 250ml Erlenmeyer Flask with a Buchner
Funnel. I lastly, weighed and recorded the data. I weighed the precipitate by removing
Buchner Funnel and placing resulting precipitate into a test tube. The data I
recorded included the weight, color, and other observations of the precipitate.
Procedure
My
major finding while conducting this experiment was that the anion and cation
created a precipitate that was yellow.
A brief summary of the experiment would be, that I started off by
mixing the Potassium Chromate solution with the Lead Nitrate solution together.
I than filtered the solution and observed the precipitate. I than weighed the
precipitate and recorded the data and all other observations.
The
Purpose of this experiment was to observe if there was a reaction between a
cation and an anion. If a reaction occurred, we had to observe the precipitate.
The chemicals that was used in the experiment was a Lead Nitrate solution,
Pb(NO3)2, and it was mixed with a solution of Potassium Chromate,
K2CrO4.
Introduction
CATIONS
AND ANION LAB
iLab,
Week #2
Name:
Courtney Dietz