6. Zinc Sheet: a rectangular, thin, sheet like metal, gray/silver. 6 5 4 3 2 1 * Solubility of solid iodine; 1. Solid iodine in 1 mL of water is slightly soluble, because the solution turns into a light brown/yellow color. However majority of the solid Iodine was left at the bottom of the test tube; which leads to the conclusion that it’s not reactive on water.
Redox Arena Lab Report Part 1 Observations of Standards Shown below and Included within the lab notes on page 11. Iodine Crystals: It was very small, round, and grey substance. Granular Zinc: It was a silver, small, grain shaped substance. It was also very hard and was slightly lustrous. Zinc ion and Iodine-iodide-triodide ion in water: It was a liquid solution in a bottle, it was very dark orange-brown color.
The solution starts to turns into a black color. Observation 4 Zinc Sulfate was placed into the test tube Green bubbles starts to come out. Observation 5 Hydrochloric Acid was added It turned clear and into a liquid solution. Observation 6 Zinc was added Silver, rock lie, and hard. Observation 7 Hydrogen Gas was being performed.
At 50C our results indicated a solubility of 89 g/100mL of H2O which was close to the known solubility of 80 g/100mL. Introduction: When a salt, such as potassium nitrate or sodium chloride, is placed in water a dissolving reaction will occur. At first, the positive and negative ions of the salt compound are only attracted to each other. In order for the salt to dissolve, these bonds must be broken so that the ions disassociate from each other. In the water molecules, hydrogen is slightly positive and oxygen slightly negative so they are attracted to ions of the opposite charge, known as dipole attraction.
Observations: * Solution turns green and bubbles * Warm to the touch * Brown gas produced * Copper Dissolves Reaction 2: Copper (II) Nitrate with Sodium Hydroxide Cu(NO3)2(aq) + 2NaOH(aq) Cu(OH)2(s) + 2NaNO3(aq) Net ionic: Cu2+(aq) + 2OH-(aq) Cu(OH)2(s) Type of Reaction: Precipitate Reaction Observations: * With addition of water, the solution becomes blue, thick, and slime-like * When added to litmus paper, paper turns dark blue * Dark blue shows that the solution is basic Reaction 3: Heating Copper Cu(OH)2(s) CuO(s) + H2O(l) Net ionic: Cu(OH)2(s) CuO(s) + H2O(g) Type of Reaction: Redox Reaction: Cu is oxidized from 2- to 2+. The reducing agent is Cu(OH)3 Observations: * While heating and stirring, solution turns greyish blue, then becomes black * Cool water mixes, solution settles to the bottom * *NOT ALL WATER WAS POURED OFF Reaction 4: Copper (II) Oxide with Sulfuric Acid CuO(s) + H2SO4(aq) CuSO4(aq) +
Focus Questions 1. How well does the appearance and solubility of iodine and zinc respectively compare with information presented in the CRC Handbook of Chemistry and Physics? The appearance and solubility of iodine and zinc presented in the table from the CRC Handbook of Chemistry and Physics were very
Repeat step 5 and 6 but replace magnesium with zinc Done so 2 metals can be tested at the same time 8. Place magnesium in one test tube and place zinc in the other test tube Done to start the reaction Done to have two reactions occurring at once 9. Look for a chemical change to occur Includes a color change, precipitate forming, or bubbles forming 10. Repeat steps 5-6 but test iron and nickel in the solution instead solution Done to test the reactivity of the two other metals, iron and nickel 11. Take zinc
Purpose: To investigate the physical and chemical properties of pure chemical substances. Observations and Experimental Data: Data Table 1: Solubility or Reaction Substance Name Color Odor Effect of Heat Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver odorless nothing bubbles bubbles No color change Bubble,fizz Slightly frothy cloudy No apparent change Cu Copper Odorless Turns darker black No apparent change No apparent change Lighter blue Holes in copper ball bubbles Dark spots on copper Zn Silver Odorless Liquid Solid Solid Lighter blue Bubbles fizzes No apparent change MgO white odorless Dark grey Cloudy Cloudy Lighter blue Fizzed bubbled Cloudy no bubbles CuCO3 green odorless pops Cloudy green h2o dissolved Turns dark green pops Blue-from pink Fizzed dissolved Turns blue Cu(NO3)2 blue odorless Melts boils Light green liquid Dissolved boils Blue-from pink Dissolved green liquid Blue bubbles NaCl white odorless crackesl Grain in h2o no bubbles Stays granular Lighter blue No apparent reaction bubbles Questions: A. Did you observe any chemical changes in this experiment? Yes. B.
Double Replacement Reactions & Table F When two substances undergo a chemical reaction, new substances are formed. A double replacement reaction is one type of reaction that can form soluble or insoluble products. The purpose of the lab was to figure out how the solubility of a substance (aqueous or precipitate) can be determined when a double replacement reaction happens. Precipitates are insoluble compounds. A precipitate is a solid product that comes out of solution in a chemical reaction.
Determination of Copper Metal Ions Through Reactions with Zinc Aim: The aim of this experiment is to determine which of the common copper ions, Cu+1 and Cu+2, is present in each of two unknown copper compounds, and whether or not the copper compounds contain the same copper ion. Nomenclature: Light blue substance: LB Dark blue substance: DB Preliminary Calculations: Identify the available test metal with the highest ionization energy. The available test metal with the highest ionization energy is Zinc. Because Zinc has the highest ionization energy (904) compared to Magnesium (736), and Aluminium (578), Zinc will be used in this experiment. Create reactions with anion placeholders for copper compound and Zinc.