For example, a plate wouldn’t have worked because it’s flat and leaves no room for the paper towels to fall through. * Bowl of water- Needed to fill the eye dropper to test the thickness of each of the paper towels. I wanted to use a pure substance and wanted to avoid chemicals. * Eye dropper- Allowed for the water to be squeezed out of onto the piece of paper towel. It was very effective because the researcher has control over how much water is being squeezed out.
The oil later added simply stayed in the middle between the liquid and the suds at the top. Analysis: 1. The substance MSG is water soluble, it completely dissolved when added to water, but was not soluble in alcohol. 2. Vegetable oil is hydrophobic and there for is not water soluble but alcohol on the other hand is completely soluble with vegetable oil.
D. 7.14g of zinc occupies 1ml in volume. A small round piece of zinc sinks when thrown in a pond and a substance like mineral oil floats on water. But f hat is true then why does zinc plated ship float on water? Although zinc sinks when it is thrown in a pond; this is due to the displacement of water. The round piece of zinc is not displacing its weight in water for it not to sink.
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.
3 The vinegar has a stronger scent than the water and appeared to have a slight change in color but not too noticeable. 4 The laundry detergent was green and cloudy and had a fresh fragrance to it. 5 Beaker 1 contents of 100 ml of water from beaker 1 was mixed with 60 ml of soil through the cheesecloth and it turned light brownish and smelled of soil. All of the water did not pass through the soil though only 70 ml did. 6 Beaker 2 contents of 100 ml of water and 10 ml of oil was poured through a cheesecloth and the water became dark brown, but there was no evidence of oil present in the soil.
- Bad breath: It commonly develops from not regularly brushing and flossing teeth. Food can stuck between teeth causing tooth decay over time. Bacteria likes thrive on these food particles causing different dental diseases. - General diseases: Hygiene practices, such as hand washing, prove the most effective ways to prevent contracting disease and spreading disease. Hands are in constant contact with both the environment and the face, providing easy transportation from the surface of an infected object or person to our nose or mouth.
Ammara Abid 9/10/14 Chem 106 A Library for Chemists Observations: * The hydrochloric acid and rubbing alcohol look almost exactly identical. If the labels weren’t on it I wouldn’t know what they were. * The mineral oil looks slightly thicker than the alcohol * The zinc shot has a small tiny teardrop shape * Zinc shot: grey color- less shiny than the granular * Zinc powder: has the consistency of flour except it is grey * Zinc Mossy: Big ½ inch pieces of zinc that resembles the zinc shot in color and texture but they are not teardrop shaped * Solid iodine: small circular pieces- black with a dark purple sheen * The solid iodine has an unpleasant smell that resembles bleach Solubility Test:
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.
A) is neutralized by water B) is surrounded by water molecules C) reacts and forms a covalent bond to water D) aggregates with other molecules or ions to form a micelle in water Answer: B Page Ref: Section 3 11 9) Which would you expect to be most soluble in water? A) I B) II C) III D) IV Answer: A Page Ref: Section 3 10) Solutes diffuse more slowly in cytoplasm than in water because of A) the higher viscosity of water. B) the higher heat of vaporization of water. C) the presence of many crowded molecules in the cytoplasm. D) the absence of charged molecules inside cells.
Fungi infections, there are several types of fungal infections. Superficial infections affect the skin examples of such infection are athlete’s foot, oral thrush and vaginitis. These types of infection although unpleasant and annoying are rarely serious. Superficial fungal infections are easily diagnosed and treated. Systemic fungal infections are when the fungus gets into the blood stream and can cause serious diseases.