In this mixture, there are no enzymes present and therefore no products are formed. The reaction rate was rated 0, just as we anticipated. 2. The 2nd experiment was a mixture of 2 mL H2O2 and 0.1g Manganese dioxide. We can use the same principal we used for the first experiment, Manganese dioxide is not a protein, not an enzyme, it is a catalyst.
Oven went up to 600°C. * Substance B—white powder, melted around 185°C. * Substance C—blue powder, turned white but did not melt. Oven went up to 600°C. * Substance D—white powder, melted around 104°C.
4) When naming an ionic compound, which ion is given first? The metal ion is named first 5) Give explanations for the following: a. Argon will not react with any other element It already has a complete number of eight, a full number in its valance shell so it cannot react with itself or another element b. The reaction between sodium chloride gives out a lot of heat and light. The chemical energy of the product is less then the chemical energy of the reactants. This energy is indestructible and is converted to light and heat.
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.
Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 No scent, color is clear 2 No scent, color is foggy, oil and water don’t mix well creating bubbles. 3 No color, water is clear, smells of vinegar 4 Smells like soap, water turned green 5 80 ml of water, brown in color, dirt sediment on the bottom, smells like dirt 6 80 ml of water, less oil, light brown in color, dirt sediments at the bottom 7 80 ml of water, slight vinegar and dirt scent, brown in color, dirt sediments at the bottom 8 80 ml of water, smells of soap, dark brown and slight green in color, dirt sediments at the bottom POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and laundry detergent to contaminate groundwater. a.
The water can be removed via heat and we are left with a white solid, Zinc Iodide sold. 2. The physical and chemical properties for some were the same and for some it was different. The color of the Zinc Iodide is different (white, while Iodine is gray and Zinc is silvery), while ZnI2 is as odorless as Zn is (I2 has a pungent odor). ZnI2 does not react chemically with mineral oil the same way I2 does (no purple color
Also, there was never a formation of a precipitate when reacting with nitrate ions. Na2CO3 + Ca(NO3)2CaCO3 + NaNO3 Na2CO3 + Cu(NO3)2 CuCO3 +
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.
Zinc ion and Iodine-iodide-triodide ion in water: It was a liquid solution in a bottle, it was very dark orange-brown color. Solid Zinc Iodide: A very white powdery substance that had several clumps within it. It was also very dry in nature. Mass Table Substance Amount of Mass Measured for Actual Mass Granular Zinc 2.0 grams 1.9 grams Iodine Crystals 2.0 grams 2.1 grams Observation of Reaction Shown below and Included within the lab notes on pages 12 and on page 14. Placing Acetic Acid in Zinc and Iodine test tube After placing the Acetic Acid in a normally unreactive test tube containing Zinc and Iodine, the solution changed to a more orange and then to a more red-brown color.
When one package of mentos was thrown into the 1L water, no reaction happened. When one package of mentos was thrown into the 2L diet coke, a big eruption was occurred. Analysis: From the result of this experiment, my hypothesis wasn’t exactly correct. When the package of mentos was put into the vinegar, there was no reaction. Summary and Conclusion: The reaction (eruption) was only produced by putting mentos into diet coke.