EXPERIMENT 5 REDOX TITRATION: TITRATION USING SODIUM THIOSULPHATE Objectives 1. 2. To prepare a standard solution of potassium iodate for use to determine the concentration of sodium thiosulphate solution accurately. To acquire the proper techniques of carrying out a titration. Introduction Redox titrations using sodium thiosulphate as a reducing agent is known as iodometric titration since it is used specifically to titrate iodine. The reaction involved is: I2 + 2Na2S2O3 I2 + 2S2O322NaI + Na2S4O6
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“Nearly one-third of teen girls who have dropped out of school cite early pregnancy or parenthood as a key reason (National Campaign 2010).” In African American and Latino girls the rate of pregnancy and dropout is the highest. According to the Civic Enterprise for the Bill and Melinda Gates Foundation found that “twenty-six percent of students said they dropped out when they found out they became a parent. (Bridgeland‚ 2006).” In my experience I find this to be true for example‚ at the age of fifteen
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To begin‚ Nagina Abdullah‚ a Life Hack author‚ writes an article‚ 5 Ways Sugar Affects Your Mental Performance‚ on how sugar affects a person’s mood‚ focus and learning and memory. Sugar is known to be linked to binge eating and dopamine spikes. Dopamine is a reward chemical in the brain. These lead to emotional crashes‚ and during these crashes‚ a person
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How does ‘the world’ change as the light changes? When light intensity around us changes‚ we look at things differently. A man in a clown suit could seem like a symbol of happiness but in the dark could represent an eerie cover-up. As the sun was setting‚ there were a number of things that changed in terms of vision. The most obvious change was that objects became harder to make out. For example‚ a park bench in the distance witch was obvious before sunset became difficult to see after the sun
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Abstract The process of photosynthesis can be summarized as the photoautotroph consumption of carbon compounds as food and release of oxygen compounds as waste. The methods to measure the rate of photosynthesis are various. One method utilizes CO2 sensors to measure photoautotrophs CO2 intake under various luminescent environments. An elementary method utilizes H2O and NaHCO3 (Sodium Bicarbonate) for submersion of deoxygenized photoautotroph specimens to measure the release rate of oxygen compounds
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AP Biology Photosynthesis Lab Bethany Boyer Due 11/12/14 Lab Write-Up Questions First Experiment 1) The independent variable in this experiment was the presence of CO2 (carbon dioxide). The dependent variable was the speed at which the leaf disks started to float. 2) In the leaf tissue‚ the bicarbonate and light are combining to carry out photosynthesis. This will cause oxygen to collect in the leaf tissue‚ causing it to rise. 3) If we were to boil the leaf disks‚ the reaction would most likely
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HIIT or high intensity interval training is basically has a succession of intervals of intense and light exercise. Always starts by heating 2-10 minutes. Then followed the dismissal of the interval (from 20 seconds to 2 minutes) intense exercise and light exercise. Number of pairs interval (fast-slow) depends on the fitness exercisers‚ how long it is this kind of training‚ the duration of the interval and the intensity of exercise in "fast" interval. HIIT training is only one of a modification of
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underground water piping systems. Lead is a natural radioactive element found in the Earth’s Crust. Lead is harming a plant’s NPP can really change vegetation health‚ which could really affect the organisms consuming these plants. The Anacharis Elodea Densa Egeria is a plant that goes through photosynthesis‚ but lead affects this plants NPP. Lead is a type of metal with a dark bluish color. It makes up about .13% of the Earth’s crust and it is a natural element. This means that it was produced or made
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Leon Miguel G. Gonzales Can Color really affect our mood? Introduction: I am curious about the effect of colors and color combinations to people. How do we react to the colors we see? How do we interpret what feeling it gives and can we cure mental deficiencies like stress‚ over thinking and nervousness? A very important aspect of our visual experience is color. It is logical to assume that what we see‚ especially color‚ can affect the systems of the body. We humans have our own reactions
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Investigating Factors that Affect the Rate of Reaction of the Decomposition of Hydrogen Peroxide Emilio Lanza Introduction- In this experiment‚ the rate of reaction‚ calculated in kPa sec-1‚ of the decomposition of hydrogen peroxide will be investigated to see how the change in concentration of hydrogen peroxide and the change in temperature affect the rate of reaction. The data will be collected by measuring the gas pressure. The product of Hydrogen Peroxide is oxygen in a gas state thus
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