Identification And Synthesis Of An Unknown Ionic Compound Essay

In this Chemistry Lab the main objective is to perform accurate chemical analysis for the quantity of elements and compounds in a sample. There will be a compound made then synthesized. The methods used were acid-base titrations, redox titrations, gravity filtration, and distillation. General conclusions included

To determine which ions are present in the two unknown solutions. This will be accomplished by mixing three known solutions with three testing solutions. You will use this information to determine which ions are present in the unknown solutions.

The experiment is to observe a variety of chemical reactions and to identify patterns in

The purpose of this particular lab was to experiment and identify the chemical and physical changes throughout the experiment.

After all materials were gathered, we then had to do five different tests to determine what the powder material does. The first test was to see what the powder materials do in water. We had to add a scoop of each of the common powders to an

The unknown sample was then heated in boiling water in step 5. The reason for heating the

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.

This paper describes the methods used in the identification, investigation of properties, and synthesis of an unknown compound. The compound was identified as calcium nitrate by a variety of tests. When the compound was received, it was already known to be one of twelve possible ionic compounds. The flame test identified the presence of the calcium anion in the compound. The compound tested positive for the nitrate cation using the iron sulfate test. At this point it was hypothesized that the compound was calcium nitrate. Reactivity tests and quantitative analysis comparing the unknown compound with calcium nitrate supported this hypothesis. Synthesis reactions were then carried out and analyzed.

We repeated this for a total of 6 known substances and 3 unknown substances. We also made a table for each element showing the color of the flame that we saw,

Procedure: Filled each test tube with substances provided and subjected them to various conditions. These conditions included, heat, cold water, hot water, acid and basic additions and tested on litmus paper. The reactions were observed and documented at each step.

This lab was to see chemical reactions with different liquids. This was important to find the unknown substance. The controlled variable was the unknown powder, since it doesn’t change. The independent variable was the liquids. These liquids were vinegar, iodine, and water. Lastly, the dependent variable is the chemical reactions. The reaction was affected by the different liquids. If the liquids are changed then the chemical reactions will be different, because they have different properties, causing the atoms to bond differently.

This compound is ionic because it did not melt when it was heated. Consequently, this indicates that the compound must have an extremely high melting point, which is one of the characteristics of ionic compounds due to the highly strong electrostatic force of attraction between positively charged cations and negatively charged anions (that is, these forces of attraction are so strong that it requires a large quantity of energy in order for the bonds to be broken). Furthermore, this compound was highly soluble in water, which is another property of ionic compounds, as when they dissolve, the ions dissociate and attach themselves to the polar ends of water molecules (cations are attracted to the localized negative poles of the oxygen atoms; anions are attracted to the localized positive poles of the hydrogen atoms). Finally, the last indicator that the compound is ionic is that the compound was an electrolyte; that is, the compound was able to conduct electricity due to the ions present within the solution, which move towards the oppositely

Part 2 to determine the empirical formula and percentage yield of the compound synthesized in Part 1. Spectrophotometry is a routine laboratory test that has the added advantage

Equipment, Materials, and Method The equipment used were a jacketed batch reactor beaker, cooling water circulation system, computer, LabPro temperature probe and conductivity probe, mixing stand and magnetic stir bar. The materials used for this reaction were a 0.08M NaOH solution and a 0.1M ethyl acetate solution. A 20% excess Ethyl acetate was used to ensure NaOH was the limiting reactant.[1] NaOH was chosen for the limiting reactant because of its high conductivity relative to Ethyl acetate. The extent of the reaction was monitored by measuring the conductivity throughout the reaction. With NaOH being the limiting reactant, the change in conductivity is more visible, and the termination of the reaction can

Materials- As a group, proper lab attire was worn at all times. Once the lab bins were obtained, other materials were retrieved and brought back to the lab bench. The materials included pH strips and reagent chemicals such as phenolphthalein and bromothymol blue. These reagent chemicals emanate a certain color to help determine whether each substance was an acid or a base. According to Senese (1997), Bromothymol turns blue when it comes in contact with a base and phenolphthalein turns pink when it comes in