Purpose/Objective The purpose of this experiment is to identify the periodic trends in the solubility of the alkaline earth metals and compare the results to that of lead Materials 1. Pencil 2. Lab notebook 3. 5 small test tubes 4. Droppers Chemicals 1. 0.2 M Mg(NO3)2 2. 0.2 M Ca(NO3)2 3. 0.2 M Sr(NO3)2 4. 0.2 M Ba(NO3)2 5. 0.2 M Pb(NO3)2 6. 1 M NaOH 7. 0.2 M NaBr 8. 0.2 M NaI 9. 0.2 M Na2SO4 10. 0.1 M Na2CO3 11. 0.2 M Na2C2O4 12. 1 M NaCl Data and Results Mg(NO3)2 Ca(NO3)2 Sr(NO3)2 Ba(NO3)2 Pb(NO3)2 NaOH Cloudy Milky Cloudy Cloudy Milky NaCl No reaction No reaction No reaction No reaction Powder NaBr No reaction No reaction No reaction No reaction Cloudy NaI No reaction No reaction No reaction …show more content…
In some instances lead reacted very similarly with the alkaline earth metal but very different in the other reactions such as with iodide. This is due to lead’s position on the periodic table as compared to those of the alkaline earth metals. The position on the periodic table correlates to an element’s atomic radius, ionization energy, and electron affinity. All of these properties affect an element’s chemical properties such as solubility. A systematic error occurred during my experiment when I observed a reaction between barium and iodide. There should have been no reaction. This error is probably the result of using a test tube that was not cleaned properly prior to combining Ba(NO3)2 with NaI. This experiment reinforced the concepts introduced in Chapter 8 of our textbook. Pre-Lab Questions 1. The names and symbols of the alkaline earth metals encountered in this experiment are: a. Magnesium – Mg b. Barium – Ba c. Strontium – Sr d. Calcium – Ca 2. a. The general electron configuration of the alkaline earth metals is [Noble gas]ns2. b. The electron configuration for lead, Pb, is [Xe]6s25d104f146p2. c. All the formulas of the oxides formed by the alkaline earth metals and lead have the general formula of RO. 3. The general formulas for the following compounds with alkaline earth metals
Solutions of 6M H2SO4, 6M NH3, 6M HCl, 6M NaOH, and 1.0 M of NaCl, 1M Fe(NO3)3, 1M NiSO4, 1M AgNO3, 1M KSCN, 1M Ba(NO3)2, and 1M Cu(NO3)2 were given in separate test tubes. The color of possible precipitates, ions, acid-base behaviour, odor and solubility rules were conducted and were reported in Table 1. The key information about a mixture of two solutions was
You can store them on the domain itself and I would say that this is the same as a PKI server because a PKI server has more of a hierarchal ladder of trust to verify users.
When the pH is not at its optimum, the differing pH's will disrupt the bonding between the R groups of the amino acid causing its structure and the shape of the activation site to change
Table 1 Concentration of protein, DNA, and ratio of the two in heart, kidney and liver of bos taurus. Average standard deviation of protein concentration is also shown.
The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY?
The purpose of the lab was to determine the ratio of air to acetylene results in complete combustion of acetylene gas. The balanced chemical equation for this experiment was C2H2(g) + O2(g) --> CO2(g)+ H2O(l). Complete combustion is the reaction of an element or compound with oxygen to produce the most common oxides and energy. Complete combustion occurs when the fuel and oxygen combine in exact proportions to completely burn the fuel, which leaves a clean test tube. Incomplete combustion is the reaction of an element or compound with oxygen to produce some oxides with less oxygen than the most common oxides. Incomplete combustion occurs when there is not enough oxygen to react
Introduction: The purpose of this lab was to find the relative solubilities of some salts of the Alkaline Earths and use that information to find the order which they appear in the periodic table; also use that information to efficiently find an unknown alkaline earth halide. Also to find the relative oxidizing powers of the Halogens given and using that information finding the order of the Halogens in the periodic table; also use that information to efficiently find an unknown Halogen.
1.What are some of the advantages and disadvantages of the current health care system in the United States?
Determining the unknown alkali carbonate was the primary goal of the lab. To distinguish the unknown given alkali metal carbonate, three methods were
Part A.1. Sodium metal is also readily oxidized by oxygen. If the product of the reaction were dissolved in water, what would be the color of the litmus for a litmus test? Explain. What is the product?
groups. It was conducted to further the research in choice overload and paralysis of the mind.
The purpose of this report is to confirm the lithology and porosity of the reservoir for my company, which is considering a water flood on a reservoir overlain by a shale seal. Also to investigate the mechanical properties of the shale seal. ∅=(∆t-∆t_ma)/(∆t_f-∆t_ma ) ………………..……......……………(1) Firstly, the saltwater neutron-density cross plot from the Schlumberger chart book was used to find the porosity and lithology of the reservoir. Figure 1 shows the usage of the neutron-density cross plot and by that the porosity was found to be 17% and the lithology was read to be quartz sandstone.
In this lab we recovered lead ions from a solution by creating a precipitate, lead(II) iodide that could be separated from the mixture. We create lead(II) iodide in this experiment by mixing a solution of lead(II) nitrate and a solution of potassium iodide. The reaction they create results in the bright yellow precipitate lead(II) iodide upon contact, Although this substance may be very interesting to look at, this and all other types of lead extremely dangerous to our health. Although contact to skin or eyes may only be an irritant that should be flushed or washed away with soap and water, exposure over time can yield more deadly effects. Long term exposure can cause damage to the brain, the nervous system, the kidneys, can cause anemia and has also been found to be carcinogenic.
In chemistry, there are two classes of observable properties matter can display; chemical and physical. These properties are classified by what needs to happen to the substance before the property becomes evident. Chemical properties require a chemical change while physical properties don’t need a chemical change to occur. Four properties of the alkali metals and halogens will be talked about through this essay, two chemical and two physical. The two chemical properties will be reactivity, how willing a substance is to undergo a chemical change and toxicity, the ability of a substance to cause damage to an
OBJECTIVE: The objective of this experiment is to find the density of metals through taking physical measurements and graphing data using the Vernier LoggerPro software. This was achieved through finding the mass and the volume of multiple samples of two types of metals and finding the average density of the samples of each type of metal, keeping record of the mass and volume of each sample, and inputting the data into the LoggerPro program.