I. Identifying an Unknown Compound
Purpose/Problem: In this lab we had to figure out what our mystery compound was by performing two tests. One of the tests was called the Flame Test, which we use to find out the metal element in the compound. It is used to find the metal because each metal gives off its own unique flame color. The other test is called the Precipitate Test, which we use to find out the non-metal element in our compound by adding silver nitrate to it. It’s used to find the non-metal because each non-metal has its own unique reaction to silver nitrate.
Conclusion:
In this lab we had to figure out what our mystery compound was by performing two tests. One of the tests was called the Flame Test, which we use to find out the metal element in the compound. It is used to find the metal because each metal gives off its own unique flame color. The other test is called the Precipitate Test, which we use to find out the non-metal element in our compound by adding silver nitrate to it. It’s used to find the non-metal because each non-metal has its own unique reaction to silver nitrate.
I figured out that my unknown compound is SrNO3 (Strontium Nitrate). The metallic ion in this compound is Strontium (Sr). I figured this out in the flame test because I recorded that SrCl2 had an orange-red flame, and that’s also the same color flame that my unknown compound had. I knew that Strontium was the metal in that compound since it was said first in the formula, so I didn’t include Chloride.
I knew that my non-metallic ion was Nitrate (NO3). I found this out after doing the precipitate test. I tested each known compound with silver nitrate as well as my unknown compound and found that it reacted by turning foggy, just like Sodium Nitrate. I saw in that formula that Nitrate was the non-metal since it was stated last, so I didn’t include Sodium.
The purpose of the Unknown White Compound Lab was to identify the unknown compound by performing several experiments. Conducting a solubility test, flame test, pH paper test, ion test, pH probe test, conductivity probe test, and synthesizing the compound will accurately identified the unknown compound. In order to narrow down the possible compounds, the solubility test was used to determine that the compound was soluble in water. Next, the flame test was used to compare the unknown compound to other known compounds such as potassium chloride, sodium chloride, and calcium carbonate. The flame test concluded that the cation in the unknown compound was potassium. Following, pH paper was used to determine the compound to be neutral and slightly
The primary goal of this laboratory project was to identify an unknown compound and determine its chemical and physical properties. First the appearance, odor, solubility, and conductivity of the compound were observed and measured so that they could be compared to those of known compounds. Then the cation present in the compound was identified using the flame test. The identity of the anion present in the compound was deduced through a series of chemical tests (Cooper, 2009).
Hypothesis: If the mystery powder is compared with the five known compounds, the mystery powder should match the one with the same physical and chemical properties. Also their reaction with water, universal indicator, vinegar and Iodine solution should match if an accurate experiment is conducted.
The purpose of conducting experiment was to determine the identity of white compound. Based on the 5 gram of unknown white compound several experiment conducted including solubility test, pH test, flame test, and ion test. Several materials including chemicals used throughout experiment and will be described through paragraphs.
An elements¡¦ reaction to certain substances may be predicted by its placement on the Periodic Table of Elements. Across a period, an element on the left will react with more vigor than one on the right, of the same period. Vertically, as elements are sectioned into groups, the reaction of each element increases as you move down in the same group. With this in mind, the reactions of the substances involved in this experiment may be hypothesized, observed, and validated.
Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide.
This specific lab will focus on the two main variants of Atomic Absorption Spectroscopy: flame AA spectroscopy, and spectroscopy using a graphite furnace. The lab will also introduce and teach how to deal with both systematic and random error when using Atomic Absorption Spectroscopy.
By doing this experiment, I can know the physical and chemical properties of these samples. After I get my results about the physical and chemical properties of these samples, I can compare my results with the information given by the past student and identify the 5 unknown samples, finding out which sample is which substance. Hypothesis = ==
Silver is an important elements in the Periodic table. Every element in the periodic table has a special symbol, and silvers special symbol is Ag. Silvers chemical symbol Ag is an abbreviation of the Latin word for silver. The Latin word comes from arguments a Sanskrit word that means shiny.
We obtained an unknown metal with an identification number (6) from the instructor. Make sure not to get fingerprints on the sample otherwise it will interfere with identifying the density of
This can be done by first finding the products of the chemical reactions, which are found by swapping the anions on each reactant. Once this is done, predictions can be made. The table above, describes the solubility rules, these are used to decide whether a compound will be soluble, and then consequently to this reveal a precipitate. Barium sulfate for example is insoluble and if it was to be mixed with an aqueous compound, barium sulfate would be the precipitate. This is an example of how a prediction can be made, without physically viewing the experiment or given the results. It is also a way of identifying what the precipitate is once the experiment has been
Obtain a sample of metal that has been immersed in boiling water and place it in the cup of water.
The labels have fallen off of two bottles thought to contain solid sodium chloride or solid sodium carbonate. Describe a simple experiment which would allow you to determine which bottle contains which solid.
The use of dissection in classrooms is able to expand the knowledge of students by giving them a hands-on approach to anatomy. Dissection is one topic that is highly debated among all people who question whether it’s an ethical thing to do. According to Webster’s Dictionary the definition of the word ‘ethical’ means morally right and good or pertaining to right and wrong. The line between right and wrong is often a very thin line and many people don’t know where one ends and the other begins. I believe that dissection is an ethical way to get students more involved in learning and can give students a better understanding of the anatomical and physiological make-up of a once living organism.