The ULTIMATE Chemistry Semester 2 Study Guide! Iron: Fe+2 is ferrous Fe+3 is ferric Copper: Cu+1 is cuprous Cu+2 is cupric Lead: Pb+2is plumbous Pb+4 is plumbic Tin: Sn+2 is stannous Sn+4 is stannic Periodic Table TRENDS * As you move right along the periodic table… decreasing atomic radius, increasing ionization energy, increasing electronegativity, increasing electron affinity, constant shielding * As you move down the periodic table… increasing atomic radius, decreasing ionization energy, decreasing electronegativity, increasing shielding WTF is that stuff? * Atomic radius is the distance between the nuclei of atoms when they are involved in a chemical bond. As you increase the number of protons in the nucleus
Contents Abstract – Page 2 Summary of Results – Page 3 Focus Question – Page 5,6 What if… - Page 6 Confidence Report – Page 7,8 Abstract Summary of Results Observations of Reactions – Trials 1 , 2 & 3 | Dissolving Barium Iodide and Zinc Sulfate in deionized water | As the substances dissolve the water becomes cloudy and acquired a white tint. | Centrifuging up the solution obtained in previous reaction | The precipitate and the liquid seperated, and there was more precipitate in one of the test tubes. The precipitate was a thick white color, not transparent. | Heating the Precipitate in a boiling tube containing 2 boiling chips | The mixture began producing a large amount of bubbles, as we continued heating it only white powder remained. | Observations of Chemicals | Zinc Sulfate | Powder of a white solid | Barium Iodide | Powder of a white solid.
With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide. In the reaction the free halogen (X2) oxidizes the other halide ion (Y-) and gets reduced by gaining electron(s). In table 3, chlorine was the strongest oxidizing agent and iodine was the weakest oxidizing agent. Since chlorine was the strongest oxidizing agent it will react more and the weak agent will react less. This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil.
Lab 5: Precipitate Patterns October 31st, 2013 Partners: Muhammad Saeed, Kristian Palmer and Kyle Poirier By: Rauman Tuan-Kichil For: Mr. Fontaine Investigation: Wastewater from metal manufacturing processes often contains toxic cations. These ions must be removed before the water can be released into the environment. Many of these ions can be removed using precipitation reactions. For example, recycled car batteries contain toxic lead cations, Pb 2+. These can be removed by adding a solution of potassium iodide, KI.
CHE 326 Experiment 2 Nitration of Methyl Benzoate I. PRE-LAB (please complete before coming to lab, should be typed, 1 page limit) [pic] A. Table of Reagents (fill in all the blanks as described in the instructions). |Compound |Mol. Weight |mmol |amount |melting point |density |Ref. | | | | |(in g or mL) | | | | |methyl benzoate | | | | | | | |nitric acid | | | | | | | |sulfuric acid | | | | | | | |methanol | | | | | | | |methyl 3-nitrobenzoate | | | | | | | B. References (provide references for the information you've given in the table of reagents) C. Safety (are any of the reagents used toxic or hazardous?
A) Pt B) P C) K D) S E) Ca 5) The symbol for the element magnesium is __________. A) Rb B) Mn C) Ne D) Si E) Mg 6) The initial or tentative explanation of an observation is called a(n) __________. A) law B) theory C) hypothesis D) experiment E) test 7) A concise verbal statement or mathematical equation that summarizes a broad variety of observations and experiences is called a(n) __________. A) law B) theory C) hypothesis D) experiment E) test 8) A separation process that depends on differing abilities of substances to form gases is called __________. A) filtration B) solvation C) distillation D) chromatography E) all of the above are correct 9) The SI unit for mass is __________.
The reaction that occurred with this step was displacement and metathesis in the form of gas formation. The balanced equation of this step looks as follows: CuSO4aq+Zns→Cus+ZnSO4(aq) Once this step was finished, the remaining copper was retrieved. First, to recover the copper HCl was added to remove all the zinc. When this happened, a yellow tint was observed in the liquid, as well as bubbling as the zinc was broken down. Once the copper dried out, it was weighed and came to a total of 240 mg.
Hydraulic fracturing or more commonly known as “fracking” is an extreme water-intensive process. Fracking uses millions of gallons of water that is mixed with sand and harmful chemicals that is injected into the ground at a high pressure to fracture the surrounding rock. This process was started in the 1860s. It was mainly popular in places like Pennsylvania, New York, Wyoming, and Kentucky. They used liquid and solidified nitroglycerin but later applied the same methods with water and gas to achieve a greater outcome.
Prohibition: America Makes Alcohol Illegal. Brookfield, CT: Millbrook, 1995. Print. Feldman, Ruth Tenzer. World War I. Minneapolis, MN: Lerner Publications, 2004.
The volume of the fracking fluid ejected through the pores exceeds the volume of the same that penetrates to the target zones. As a result, there is accumulation of the fluid and this raises the pressure to a point that forces the rocks in the target zones to crack. The flow of the fluid into the well then stops, and the fluid begins to flow into the opposite direction (upwards) to eject the fluid. Within the fluid are components called proppats, which could be sand or ceramics (Mooney, 2011). These do not flow out of the fractured target zones.