Lab Report Flame Test

4. Why does the flame color change back to orange, after the metallic solution has been turned completely into a gas

The primary goal of this laboratory is to correctly identify an unknown substance. To achieve this task, one may use various tests that reveal both chemical and physical properties of a substance. By comparing the results of a known substance and the unknown substance, one may eliminate alternative possibilities and more accurately predict the undisclosed compound. Furthermore, by performing these tests, data can be collected and verified regarding chemical and physical properties of the unknown. Understanding the chemical properties of a known substance aids one’s understanding of the unknown based on comparative analysis of the results of the tests.

10. Jewellery to be taken off 11. Results: |Solution Name |Color of Indicator |Acid/Base/Neutral | Bleach |Green |Acid | |Baking soda |Blur/Green |Base | |Distilled Water |Purple |Neutral | |Lemon Juice |Red/Fuschia |Acid |Purple |Vinegar |Red/Fuschia |Acid | Discussion: The results found it the experiment adheres to the hypothesis. As shown in the Results above we were able to find out the chemical compounds that were acidic, those that were alkalis and those that were neutral. This was identified by using a known acid (Bleach) and a known base (Baking Soda).

The Vitamin C turned to a red/orange color with no physical/chemical reaction. For the salt the solution turned to an orange color with no physical/chemical reaction. With the Alka-Seltzer, the solution turned to a brown color with no reaction as well. Last but not least, the Baking soda turned to an orange/brown color with no reaction.

Flame Test Lab Questions: 1. What color of light is the lowest in energy? According to our physics class last year, the color with the lowest energy is red because it has the lowest frequency and the longest wavelength out of all colors. We can conclude that calcium chloride has the lowest energy.

In the lab, Bunsen Burner operation, we were given 6 known substances (Calcium Chloride, Copper Chloride, Lithium Chloride, Potassium Chloride, Sodium Chloride, and Strontium Chloride) and 4 unknown substances. The goal of this lab was to match 4 of the known substances to the 4 unknown substances. Scientists are able to do this because when the wooden splint is inserted into the hottest part of the flame the electrons entered an excited state and release energy in the form of visible light. The light emitted is unique for every metal ion because every ion has a distinct electron configuration. Scientists are then able to identify what substance was burned from the color of the flame.

The experiment and the purpose of the experiment consisted of comparing known and unknown compounds based on established standards of flame color and solid compound characteristics. By observing the colors of the salts, we were able to conduct a flame test and identify it. My hypothesis was that by comparing the flame colors of metal ions to known standards, the identity of the salt compound could be determined. Ultimately, our hypothesis was proven right, and we correctly identified the known and unknown compounds. The justification for the hypothesis is because according the Bohr’s atomic model, electrons are found in energy levels outside of the nucleus.

I dipped the wire in hydrogen peroxide to clean it, then in water, then in the chemical. While the chemical was in the flame I took note of heat, color and pressure. After the test was over I disposed of the wire and prepped the next chemical. The above steps were recorded

Choose an unknown sample to test for estate the same results from other groups. After choosing the unknown sample, we tested for the following properties like physical characteristics, conductivity, solubility, conductivity of the solution, aqueous solution, and flam testing. For each step that written the results recorded in the table for matching the same sample from each group. Group 5 has the same solid that we have in group 10.

Flame Test Practical Explanation The colours displayed in this practical changed depending on the metal chloride solution that was used for example the copper displayed a bright green colour and the lithium displayed a dark crimson red. This is cause by a quantum of heat being transferred into the electrons, exciting them causing them to jump from one ring to another and once the heat has cooled the electrons then return to the lowest possible ring. Errors - Contamination - Flame Heat - The ring could have been held at a different height - Human perception errors -

Purpose: The purpose of the Flame Test was to identify unknown elements using a flame test. Background Information: An electron is a negatively charged particle found in an atom, electrons move around the nucleus in energy levels. The first level has a maximum of two electrons, the second and third levels have a maximum of eight electrons, and the fourth level, and every level above that, has a maximum of eighteen electrons. In each level there is a sublevel, these are labeled in four letters, s, p, d, and f. The first level has one sublevel, s.

Experiment 12.2 Purpose: To measure the specific heat of a metal. Materials: A calibrated thermometer, a scale that reads mass, 2 Styrofoam cups, a chunk of metal of at least 30.0 grams, boiling water, kitchen tongs, and safety goggles.

Flame Test Purpose: The premise of the lab experiment was to observe the color of visible light emitted from several compounds and find what the unknown substance is by comparing its reaction to others. The emission of light, more so, occurs when an electron releases absorbed energy from its excited state and reverts back to a position of lower energy, a ground state. Procedure: In order to achieve the results for the experiment, a Q-tip was used to place near the Bunsen burner.

Chemists should be aware of the identity of a metal ion in a sample due to various reasons that could alternate and determine certain compounds, their use and characteristics. Starting off with the beginning, metal ions can be identified by performing the Flame Test. Although not all metal ions give a colour, this experiment should still be performed because it can give you a hint. However, for the majority of the metals that do give a colour, this test is very useful and it's achieved by carrying out the following procedure: clean the wire by dipping it into concentrated HCl and then hold it in the hot Bunsen Burner. Proceed by dipping it again in the HCl acid and then into the compound solution you are testing for to be further placed again

The main objective of this experiment is to carry out qualitative analysis to identify metal cations in unknown solution 1.