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.
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.
Watch as the pickle burns yellow and sparks * Observations: Classification of metal/nonmetal 1. The charcoal did not conduct electricity at all even after the HCL was placed on it 2. The small metal balls did not all conduct electricity but after a drop of HCL was placed on it, the metal ball then conducted electricity 3. The metal file conducted electricity 4. The HCL did not conduct electricity * Observations: Penny in HCL 1.
1. In the following list, only __________ is not an example of matter. A) elemental phosphorus B) light C) table salt D) planets E) dust 2. What is the physical state in which matter has no specific shape but does have a specific volume? A) gas B) solid C) salts D) ice E) liquid 3.
Procedure Summary- Obtain 12 g of copper(II) sulfate pentahydrate and record the combined mass. Add water to the copper(II) pentahydrate. Heat the mixture, but do not let it boil. Add 2 g of iron fillings into the mixture while stirring the solution. Let it stand for five minutes.
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
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.
Focus Questions: 1) What happens Qualitatively on both the Macroscopic and Atomic levels when zinc, Iodine and Acidified Water are mixed? Does a Reaction Occur? On the Macroscopic Levels, there is no reaction. However, when Zinc and Iodine and Water are mixed together a color is formed in the solution and a release of heat occurs, an exothermic reaction. The color starts out as a reddish brown color, and then, when swirled, becomes a gold yellowish color, and slowly becomes transparent clear at the end of the reaction.
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.