Metallic Ions
Ocean County College
Department of Chemistry
Identification of Metallic Ions
Date Submitted: July 4, 2015 Date Performed: July 4, 2015 Lab Section: Chem-181DL1 Course Instructor: Prof. Amal Bassa
Purpose
The purpose of this experiment was to perform and observe the flame tests of some alkali and alkaline earth metal ions.
Procedure
To begin I placed approximately 0.5 mL of sodium nitrate in a well of the 24-well plate. I then placed approximately 0.5 mL of the remaining 6 solutions and the unknown in 7 other wells of my well plate. Then taking a cotton swab, I soaked it into the sodium nitrate and moved the soaked end through a flame and recorded if there was a change in flame color. I then repeated these steps for the other 7 solutions.
Observations
Metallic Ion
Flame Color
NaNO3 Sodium Na+
Yellow
Sr(NO3)2 Strontium Sr2+
Red
KNO3 Potassium K+
Violet
Ba(NO3)2 Barium Ba2+
Yellow-Green
Cu(NO3)2 Copper Cu2+
Blue-Green
LiNO3 Lithium Li+
Deep Red
Ca(NO3)2 Calcium Ca2+
Orange-Red
Unknown
Orange-Red
Conclusions
From my research I determined that the unknown solution to be Calcium.
References
1. 50-0123-CK-02-Lab Manual.pdf
Questions
A. The alkali and alkaline earth metals include all the metal ions except for copper (transition metal)
B. Sodium produces a yellow flame, and sodium in found in most foods.
C. The flame only can produce a few colors and several metallic ions can produce the same color, so the method is not perfect.
D. Alkali and alkaline earth metals have several electrons and when electrons get excited and then return to their ground state, electromagnetic energy is released. Some of that released energy is visible light that is seen on the electromagnetic
Department of Chemistry
Identification of Metallic Ions
Date Submitted: July 4, 2015 Date Performed: July 4, 2015 Lab Section: Chem-181DL1 Course Instructor: Prof. Amal Bassa
Purpose
The purpose of this experiment was to perform and observe the flame tests of some alkali and alkaline earth metal ions.
Procedure
To begin I placed approximately 0.5 mL of sodium nitrate in a well of the 24-well plate. I then placed approximately 0.5 mL of the remaining 6 solutions and the unknown in 7 other wells of my well plate. Then taking a cotton swab, I soaked it into the sodium nitrate and moved the soaked end through a flame and recorded if there was a change in flame color. I then repeated these steps for the other 7 solutions.
Observations
Metallic Ion
Flame Color
NaNO3 Sodium Na+
Yellow
Sr(NO3)2 Strontium Sr2+
Red
KNO3 Potassium K+
Violet
Ba(NO3)2 Barium Ba2+
Yellow-Green
Cu(NO3)2 Copper Cu2+
Blue-Green
LiNO3 Lithium Li+
Deep Red
Ca(NO3)2 Calcium Ca2+
Orange-Red
Unknown
Orange-Red
Conclusions
From my research I determined that the unknown solution to be Calcium.
References
1. 50-0123-CK-02-Lab Manual.pdf
Questions
A. The alkali and alkaline earth metals include all the metal ions except for copper (transition metal)
B. Sodium produces a yellow flame, and sodium in found in most foods.
C. The flame only can produce a few colors and several metallic ions can produce the same color, so the method is not perfect.
D. Alkali and alkaline earth metals have several electrons and when electrons get excited and then return to their ground state, electromagnetic energy is released. Some of that released energy is visible light that is seen on the electromagnetic
References: 1. 50-0123-CK-02-Lab Manual.pdf Questions A. The alkali and alkaline earth metals include all the metal ions except for copper (transition metal) B. Sodium produces a yellow flame, and sodium in found in most foods. C. The flame only can produce a few colors and several metallic ions can produce the same color, so the method is not perfect. D. Alkali and alkaline earth metals have several electrons and when electrons get excited and then return to their ground state, electromagnetic energy is released. Some of that released energy is visible light that is seen on the electromagnetic spectrum.