Chemical Compounds And The Compounds

Based the data collected, the identity of the unknown #42 is lithium chloride. Because the unknown compound produced a bright red pinkish flame, shown in Table 1, the possible cations based on the CRC Handbook were lithium or strontium 1.The known 1M lithium chloride also produced the same colored flame as the unknown, suggesting that the unknown compound has lithium. Since lithium produces no precipitate with the compounds in Table 2 and strontium produces a precipitate with the same compounds, the observations in Table 2 indicate that the unknown’s cation is lithium 4. Using the solubility table, process of elimination, and the results in Table 3 the possible anions for the unknown compound were chloride and bromide4. The production of precipitate

Ionic compounds are soluble in water to a certain point depending on the compound. The level of solubility changes among different compounds. Some ionic compounds can completely dissolve in water and appear to be a homogeneous mixture. Although, some ionic compounds dissolve very little, and could be considered insoluble, since it does not dissolve fully. Depending on the compound, the level of solubility can be high or low. However, ionic compounds could dissolve to a certain degree. If the solution appears to be a heterogeneous mixture, many may assume through visual representation that it may be insoluble. As stated previously, the smallest amount of solubility should be considered. To confirm whether or not the substance is soluble, observe the efficiency when conducting electricity. Due to practical reasons, the slightest solubility could be considered insoluble by people.

What Is The Unknown White Compound By Alexander Medina Lab Partners Maxwell Yurs, Eugene Floersch, Mesih Harri Abstract A white compound is found, but its identity is unknown.

10. Ba (NO3)2, barium nitrate produces pale precipitate when put in reaction with sulfuric acid.

In a chemistry stockroom, a vial of an Unknown White Compound was found. In order to properly dispose of the substance, the substance has to be identified .The possible compounds has been limited to one of 15 different compounds. Also, approximately 5 grams of the Unknown White Compound (UWC) were available for testing. In order to determine the properties of the compound, a series of tests was conducted. These tests included a ph test, a conductivity test, a flame test, a sulfate test, a halide test, an ammonium test, a solubility test, and a carbonate test. Using the results of these experiments, it was hypothesized that the UWC is potassium chloride. To further confirm the hypothesis, a synthesis of potassium chloride was conducted.

Unknown white compound (823U) was discovered in the lab. In order to dispose of it correctly, the substance and its physical and chemical properties had to be identified. The unknown white compound was one of a list of 15 compounds. 5g of the unknown compound were given in order to correctly identify and discover its physical and chemical properties. In order to do so, a solubility test, a flame test, and ion tests were conducted. From the results of these initial tests and the given list of compounds, the unknown white compound was thought to be composed of sodium and a halide (I-, Br-, or Cl-). Of the list, NaCl was the appropriate compound, however NaC2H3O3 was also tested out of skepticism. To verify the identity of the substance, the solubility and flame tests were performed again along with a pH test. The pH tests of NaCl and NaC2H3O2 did not match that of the unknown white compound. The list of compounds had been entirely ruled out. The identity of the unknown white compound was revealed to be calcium chloride. To synthesize at least a gram (calculated to produce 1.2g) of CaCl2, the following reaction was completed.

Similarly, the sugar, baking soda, Epsom salt, and washing soda are all dissolved in water. Next, we observed the color after adding the universal indicator. The unknown substance came out a greenish yellow and almost perfectly matched, the Urocit-K had the same. Then, we tested the reactions the solids had with heat. The unknown substance did not react.

The goal of the experiment was to identify Unknown 33A and 33B. Unknown 33A was a white, crystalline solid that had a sweet cherry smell and Unknown 33B was a beige, yellowish color liquid that was translucent and had a viscosity similar to water. Also, the liquid was homogenous and smelled sour, similar to mildew.

As a result of this lab experiment, the hypothesis is attested to be precise as the ionic compounds did go through a double displacement reaction. The purpose of this experiment was to establish what occurs when two pairs of compounds react with one another. The information collected while doing the lab has allowed more knowledge to be obtained, as one can visibly see the changes happening and different signs of chemical changes. The cations and anions in the ionic compounds have successfully exchanged places with one another, creating the compounds with the different properties evident in the observation given. For example, precipitates were visible in almost all reactions in this experiment. Therefore, this lab experiment was held to demonstrate

In reference to the analysis of anions, Table 1 shows that a precipitate was formed when our unknown was combined with HNO3 and AgNO3, thus indicating the presence of a chloride ion. Because our unknown did not form a precipitate due to HCl and BaCl2, separate, effervesce, or smell, we concluded that neither sulfate, nitrate, carbonate nor

Aqueous solutions of ionic substances will be experimented with in this Ionic Reactions lab. Aqueous solutions are solutions that water is solvent. After ionic substances dissolve in water, ions separate and become surrounded by water molecules. When these ion separate, its called dissociation.

The reaction between sodium sulfate (Na2SO4) and barium chloride (BaCl2) created a white precipitate. This reaction possibly

Aluminum had no reaction to the NH3 at all. When an excessamount of NH3 was added barium formed a white precipitate, cobalt formed a pink precipitate,copper formed a bright blue precipitate, iron formed an red precipitate, magnesium had a whitesmooth precipitate, manganese had a tan precipitate, and lead and zinc both turned clear.The unknown metal cation contains either zinc or lead. To discover which one is presentthe unknown is tested with sulfate because only lead and barium react with the sulfate. Barium isnot an option in the unknown metal mixture, so if a reaction occurs it is known that lead ispresent. In this case there is no reaction so zinc is present meaning that Zinc White is the presentpigment. Zinc white was introduced in 1840. Next the unknown is tested for iron, copper, orcobalt. This is done by mixing the unknown

We used a Bunsen burner, Ni-Cr wire, and the eight different metal ions for this lab. We had to place several drops from one of the solutions on the end of the Ni-Cr wire, then one person holds the wire in the flame, and the others observe the colors of each solution through the spectroscope, then record data, and then repeat each step for the other solutions. When done, clean the wire and any spills and turn off the Bunsen burner. For the unknown substance (number 3), we found out that it was barium because when we did the flame test on barium, it’s flame color was yellow and it was yellow for the unknown too. Also, the unknown and barium had the same colors on the spectroscope reading and the three colors were close to being on the same number, and the unknown didn’t fit with any of the other solutions’

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