Manganese dioxide is an inorganic molecule that can achieve this. The catalyst lowers the activation energy of the decomposition which is already noticeable without the addition of a catalyst. In our lab we observed that the Manganse dioxide had no effect on the reaction, however it should have a significant
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.
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
I can also figure this out from are observation of the elements. Metals are shiny and conductive, Mg, Pb, and Sn fit in to this. Nonmetals are dull and nonconductive, S, and C fit in to this description. Si fits into both of these Conclusion For this lab we were given 6 different elements, and were told to observe them both physically and chemically. A source of error in this experiment would be in the reaction to copper chloride, we did not wait long enough to record our observations and we added too much of it to each elements not allowing us to get the most correct of observations.
She believes the milk industry is one of capitalism’s greatest deceptions (De Vivo). Surprisingly, studies show that milk is not good for you and has little nutritional value. Milk can cause constipation, stomach aches, food rejection, reflux, and allergies. The milk industry’s biggest statement is that it contains a good source of calcium. According to Marcela and an article from Cindy Cleary and Jo DelAmor, calcium in milk cannot be absorbed in our bodies because there is not a sufficient amount of magnesium.
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.
Lab Report: The Redox Arena PART 1 Results TEST | Solute | Iodine test | Iodide ion test | Triiodide test | Zinc ion test | Zinc metal test | Grey solid(Zinc metal) | NegativeSolid settled in bottom | NegativeNo change | Negative | NegativeNo change | PositiveFizzing seen | Colored solution(Mixture of zinc and iodine in acidified water. Reaction is incomplete) | Positive Light purple layer formed on top | Positive Precipitate | Positive | Positive Black dust on top | Negative No change | White solid(Zinc iodide) | NegativeSolid stayed in bottom | Positive Precipitate | Negative | Positive Blotches of black | Positive Fizzing seen | Iodine crystals | PositivePurple layer formed | Negative | Negative | Negative Fizzing | NegativeTurned greenish yellow | Granular zinc metal | Negative No change | Negative | Negative | NegativeNo change | Positive Fizzing seen | Zinc ion and iodine-triiodide in water | Positive Purple layer formed | Positive Pale yellow precipitate | Positive | Positive Patch of black | Negative Turned reddish | Solid zinc iodide | Positive Pink layer formed | Positive Pale yellow precipitate | Positive | Positive Black deposit and fizzing seen | Negative Dissolved completely | Focus question 1. Zinc and Iodine, in the presence of acidified water, react chemically to form Zinc Iodide (ZnI2) solution. The atoms of Zinc and Iodine form an ionic bond, with Zinc becoming attracted to two Iodide ions. The water can be removed via heat and we are left with a white solid, Zinc Iodide sold.
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.
Chose and Obtain Sulfate Solution will form aqueous compound as sulfate when combined with anything is aqueous · Is an anion 3. Chose and Obtain Nitrate Is an anion · Need another anion to test and see if order of reactivity is correct for each anion Solution will always form an aqueous compound according to Alchem Table 4. Chose and Obtain Copper Used by different lab partners whose data was observed Carrying Out The Reactions & Collecting Data How Why 5.Place 10ml of water in a test tube Done so aqueous solution may be made 6. Take magnesium nitrate and place 3 drops into test tube with water Done to have one part of the reaction 7. Repeat step 5 and 6 but replace magnesium with zinc Done so 2 metals can be tested at the same time 8.
Reactant B- Sodium Chromate(aq)~Na2CrO4 Sodium Chromate is an odorless yellow crystalline powder. It melts at 1457.6oF, has a molar mass of 162g/mol, and a density of 2.7g/cm3. It is soluble in water and slightly soluble in ethanol. Sodium Chromate shouldn’t be inhaled, ingested, or touched (absorbed through skin) as it is toxic and can be fatal. It is not combustible, but it speeds up the combustion of other substances because it is an oxidizing agent.