Salinity Experiment Aim To determine a method of measuring a soil sample’s salinity level in order to measure 3 samples’ salinity level. Hypothesis I think that by running a current through a salt solution and measuring the resultant amperage‚ a pattern in the recordings will help find a soil sample’s salinity level. Variables Controlled Amount of solution (100 mL)‚ supplied voltage (4V)‚ amount of soil (50 gm) & water (150 mL) in soil sample’s solution. Independent Amps recorded
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Experiment No. 9 INTEGRATED CONCEPTS OF EQUILIBRIUM RESULTS AND DISCUSSION A system in equilibrium can be affected by the addition of another reagent leading to a change in chemical equation with a new equilibrium constant. An overall reaction is the sum of two or more reaction steps with different equilibrium constants. The overall equilibrium constant‚ Koverall‚ is the product of the equilibrium constants of the individual reaction step. If a reaction step is reversed‚ the equilibrium
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Lab 3 – Homework 1. Purpose of today’s experiment: To determine the effect osmotic pressure might have on cellular membranes‚ specifically when beet slices are placed in NaCl solutions of varying concentrations. 2. Hypothesis: The osmolarity will directly increase with increasing NaCl concentrations. 3. Control = Distilled Water – this was present in all solutions 4. The independent variable – salinity of the 6 solutions; while predetermined‚ the NaCl concentrations varied from 0% to 15%.
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Background information Daphnia Magna is an arthropod that can grow up to 5 mm. It is a filter feeder meaning it feeds off of suspended particles in the water. Daphnia can consume particles that range from 1µ to 50µ. The heart of Daphnia is located dorsally meaning it’s located in the back. The heart rate of Daphnia can range due to many variables‚ one being temperature. "At a temperature averaging 20o C its heart rate is about 200 beats per minute."2 As the temperature surrounding the Daphnia
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Problem How can the understanding of colligative properties be applied to making ice cream? Hypothesis Adding salt to the water lowers its freezing point (freezing point depression‚ which is a colligative property). The water will now stay liquid at lower temperatures‚ which is required to make ice cream. Procedures 1. Get all the materials : - 1/2 cup milk - 1-quart plastic bag - 1/2 cup heavy cream - 1-gallon plastic bag -
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K.R.Mangalam World School South City-I‚ Gurgaon Class-VIII Sub.-Chemistry (Chemical Effects of Electric Current) EXTRA QUESTIONS: Q. Why the bulb glows when the electric current passes through it? Ans. Due to the heating effect of current‚ the filament of the bulb gets heated to a high temperature and it starts glowing. Q. Write a short note on: (a) LED Ans. LED- Light Emitting Diodes are used for lighting. There are two wires(called leads) attached to a LED. One lead is longer than the other
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Success of Dugesia tigrina regeneration in different water temperatures Abstract: The experiment at hand aimed to determine if the species Duguesia tigrina has an optimal temperature for regeneration. The experiment used three different spring water treatments of different temperatures. The treatments included a cool 12° treatment‚ a room temperature 25° treatment‚ and a warm 30° treatment. Each of the D. tigrina were cut in half‚ and each half was placed into a designated section of a water treatment
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Chemistry 12 Santa Monica College Determination of Kc for a Complex Ion Formation Objectives • • Find the value of the equilibrium constant for formation of FeSCN2+ by using the visible light absorption of the complex ion. Confirm the stoichiometry of the reaction. Background In the study of chemical reactions‚ chemistry students first study reactions that go to completion. Inherent in these familiar problems—such as calculation of theoretical yield‚ limiting reactant‚ and percent yield—is
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Case Study : Morton Salt 1. Briefly describe salt production‚ from brine production to finished round cans. Salt is obtained by introducing water into salt caverns which in turn dissolves the salt deposits within the caverns‚ allowing the salt solution (brine) to be brought to the surface for further processing. The brine is boiled in order to remove most of the liquid‚ resulting in salt crystal deposits. The salt crystal deposits are then further dried to remove all residual moisture to produce
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As ice freezes on the concrete‚ it creates a dangerous‚ slick surface. Driveways‚ sidewalks‚ patios‚ and parking lots covered with ice can cause falls‚ making you liable for injuries. So most people rely on deicers such as salt because it does a great job melting ice‚ but it also damages concrete surfaces over time. How does salt damage concrete surfaces? Salt lowers the pH balance in the concrete. Because it is acidic‚ it weakens the strength of the concrete and increases the sizes of the pores
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