Free chlorine is the chlorine available to sterilise the water and is usually represented by hypochlorous acid and hypochlorite ions. When a solution containing free chlorine is exposed to ultraviolet light both hypochlorous acid and hypochlorite ions are broken down as shown below: 2OC〖l^-〗_((aq.))+u.v.→2C〖l^-〗_((aq.))+〖O_2〗_((g)) 2HOCl_((aq.))+u.v.→2HCl_((aq.))+〖O_2〗_((g)) When chloramine is exposed to high-energy
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An invasive species is a plant, animal, or microorganism that is not native to the environment. Just one invasive species in Ohio is the, Japanese Honeysuckle - Lonicera japonica. The Japanese honeysuckle is a semi-evergreen vine that can climb up to 10m and drapes creating dense patches. It has white - yellow flowers that grows in pairs. The flowers are very fragrant, with a sweet fruity smell. This plant is from Eastern Asia, including Japan and Korea. The damage is causes is the vines can wrap
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In the lab, All That Glitter, students learned to calculate and differentiate the density of different forms of matter. Students calculated the density of pre-1982 pennies, post-1982 pennies, and an unknown metal sample. In order to complete the lab, students first took ten pre-1982 and post-1982 pennies and carefully dried them. Afterwards, the pennies were placed on a digital scale in order to find the mass. Students then found the volume of the pennies by filling the graduated cylinder with
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To start the lab, the wire was cut into two pieces, both about 12 inches in length. The wire was burnt from one end on each of the wires to expose the copper end, one wire was burned an inch and half the other an inch. Crayfish was selected from the box and the claws were taped off and placed it into the pan. Using the needle provided two small holes were made through the cephalothorax. One hole will be on the upper cephalothorax where the copper wire with one inch burned is placed. The other hole
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Over the course of this lab, I was surprised to learn that many household substances didn’t have the pH I originally expected them to. Of course, items like windex or vinegar that fall into the typical definition of acidic or basic items weren’t that shocking, but many other substances such as nail polish, shampoo, mouthwash, and hairspray defied my expectations. For example, I had anticipated that hairspray would be more acidic, but the pH strip immediately turned a dark green, identifying as having
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Student Name: Andreas Sippl Student ID: 4445491 Date: 04 January 4, 2015 Course and Section Number: SCIN131 Lesson 6 Lab: Titrations and Natural Acid/Base Indicators Begin by viewing the following Thinkwell videos 15.1.7 CIA Demonstration: Titrations 11.2.2 CIA Demonstration: Natural Acid-Base Indicators (NOTE: The second video is sort of a supplement to the first, and shows how this applies to your daily life. Feel free to try some of the things listed in the video, but be sure to report
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1. What ppm values (and standard deviations) did you determine for each type of water? Buxton hall’s water had 42 ppm of CaCO3 present in all three trials conducted. The standard deviation from this test was 0. Kroger water had a 46.2 ppm of CaCO3 in the first trial, 50 ppm in the second trial, and 43.2 ppm in the third trial. The standard deviation for the second water sample was 3.41. Crystal Geyser water had a 16.42 ppm of CaCO3 in the first trial, 21 ppm in the second trial, and 22 ppm in
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body’s chemical environment normally changes from a weak acid to a weak base within a 24-hour period, usually most acidic at dawn and most base (alkaline) at sunset. In a pH-balanced body, the urine is slightly acidic in the morning (5.5 - 5.8), and it becomes more alkaline (6.4 - 6.6) toward evening, as no food or beverage is consumed while sleeping. During the day, the body buffers pH by releasing bases (bicarbonates) and acids (carbonic acid), so pH climbs or drops, but when the urine’s pH is outside
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of cations depends on the solubility products of the ions. The cations get precipitated on the optimum needed concentration and easily detected. 1st group of cations The group (I) cations form the insoluble chlorides. The dilute hydrochloric acid (generally 1-2 M concentration) is used as the group reagent. The Concentrated HCl is not used because it forms a soluble complex ion ([PbCl4]2-) with Pb2+ and would not be detected. The most important cations of 1st group are Ag+, Hg22+, and Pb2+
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phenomenon present in microbiological systems. The chemistry of the predominant biological elements of groups I to VII will be discussed. The students will explore the principles of inorganic chemical phenomenon including partially soluble substances, weak acids and bases, buffer systems and redox reactions. In addition, a basic understanding of the chemistry of the biologically important elements (H, C, N, O, K, Na, Ca, Mg, P, S, Cl and some transitional elements) will be explored. Course
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