Chemical Changes Lab
Experiment: Observations of Chemical and Physical Changes
Derrick Davis
Lab partner: None
Location: My house
Date Performed 25 Feb 15; 1600
CHE111-CO2
Photo 1 (Photo of me properly wearing safety goggles holding the student information card)
Abstract:
In chemistry it is important to understand the difference between physical and chemical changes. The objective of this experiment was to perform tests using heat or chemical mediators and observe the results for any physical or chemical changes. Various materials were heated or mixed, monitored and results recorded. Numerous chemical and physical changes were noted during the procedure. It was possible to distinguish between physical and chemical changes using scientific observations.
Experiment and Observation
Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03, 2015)
Table 1
Well
Chemical #1 (4 drops)
Chemical #2 (4 drops)
Observations:
Chemical Change (Y/N)
A1
NaHCO3
(Sodium Bicarbonate)
HCl
(Hydrochloric Acid)
Bubbles, no change in color, clear,
Y
A2
NaOCl
(Sodium Hypochlorite)
KI
(Potassium Iodide)
Observation 1: clear, no color change. …show more content…
Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using you results from Data Table 1 as a guide, how would you test this material for the presence of sodium bicarbonate?
You could test this material by taking a small sample of the household product and dripping some hydrochloric acid into it and see if there is bubbles that occur from a carbon dioxide release. If the resulting product does bubble you may have sodium bicarbonate in it.
2. Write the chemical equation for the reaction in well A6.
AgNO3 (aq) + NaOH (aq) → AgOH(s) + NaNO3
Derrick Davis
Lab partner: None
Location: My house
Date Performed 25 Feb 15; 1600
CHE111-CO2
Photo 1 (Photo of me properly wearing safety goggles holding the student information card)
Abstract:
In chemistry it is important to understand the difference between physical and chemical changes. The objective of this experiment was to perform tests using heat or chemical mediators and observe the results for any physical or chemical changes. Various materials were heated or mixed, monitored and results recorded. Numerous chemical and physical changes were noted during the procedure. It was possible to distinguish between physical and chemical changes using scientific observations.
Experiment and Observation
Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03, 2015)
Table 1
Well
Chemical #1 (4 drops)
Chemical #2 (4 drops)
Observations:
Chemical Change (Y/N)
A1
NaHCO3
(Sodium Bicarbonate)
HCl
(Hydrochloric Acid)
Bubbles, no change in color, clear,
Y
A2
NaOCl
(Sodium Hypochlorite)
KI
(Potassium Iodide)
Observation 1: clear, no color change. …show more content…
Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using you results from Data Table 1 as a guide, how would you test this material for the presence of sodium bicarbonate?
You could test this material by taking a small sample of the household product and dripping some hydrochloric acid into it and see if there is bubbles that occur from a carbon dioxide release. If the resulting product does bubble you may have sodium bicarbonate in it.
2. Write the chemical equation for the reaction in well A6.
AgNO3 (aq) + NaOH (aq) → AgOH(s) + NaNO3