Chemistry Lab Report on standardization of acid and bases. Purpose: To prepare standardize solution of sodium hydroxide and to determine the concentration of unknown sulfuric acid solution. Data and Calculations: This experiment is divided into two parts (Part A and Part B). In the first part of experiment‚ the standardize solution of sodium hydroxide is prepared by titrating it with base Potassium hydrogen phthalate (KHP). The indicator Phenolphthalein is used to determine that whether titration
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purpose of laboratory assignment 3 was to measure the rate at which a chemical reaction takes place. For the purpose of this lab we measured the rate a balanced oxidation/reduction reaction between iodine‚ hydrogen‚ and bromate ion occurs. The above reaction occurs slowly so we used a coupled iodine clock reaction to measure the rate of the oxidation/reduction reaction because it occurs much faster but is still dependent upon the other reaction. To accomplish this‚ two mixtures were prepared in separate
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on the mass of potato Introduction- diffusion is a passive transport where molecules move from areas of higher concentration to areas of low concentrations. Although the molecule ’s movement is random‚ equilibrium is being sought out. Osmosis is a type of diffusion only It involves water. In osmosis water diffuses from the area of high concentration to an area of low concentration‚ to diffuse the more molecule rich side. Because cells have selectively permeable membranes‚ meaning certain substances
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Alka-Seltzer Reaction Rates Lab What are the different factors the effect the reaction rate of Alka-Seltzer? Matthew Arkfeld Leah Gilligan Jessie Abbott Period 4 June 2nd‚ 2008 Background Research: o The objective of the experiment was to determine if different factors affect the reaction rate of Alka-Seltzer. Alka-Seltzer provides fast relief to acid indigestion‚ upset stomach‚ heartburn‚ headaches‚ body aches and pains. It is an antacid and pain relief medicine used by millions
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In this experiment‚ the class examined how the rate of photosynthesis was affected by different light colors at different distances in shoots of a Cabomba plant. The plants were placed in two different beakers‚ one with recently boiled and cooled distilled water and the other with saturated sodium bicarbonate solution. The three different color photoflood lamps used for this experiment were white‚ red‚ and green at four distances of thirty‚ sixty‚ ninety‚ and one hundred-twenty centimeters away
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Chemistry 12 Formal Report Measuring Reaction Rate using Volume of Gas Produced By John Doe 23th October 2012 Introduction An essential element of chemistry is finding reaction rates. This is because chemists need to know how long a reaction should take. In addition to needing to know the rate of a reaction at any point in time to monitor how the reaction is proceeding. Many factors effect reaction rates‚ two shown above include temperature and concentration. Concentration affects the
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respiration into alcoholic or lactic acid fermentation. Fermentation is an anaerobic‚ metabolic pathway used to oxidize nicotinamide adenine dinucleotide (reduced) (NADH) into nicotinamide-adenine-dinucleotide (NAD+). As with many other unicellular organisms‚ yeast ‚cannot carry out cellular respiration and tends to participate in fermentation and produces ethanol. In has been suggested
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Cause of increasing crime rate in Cambodia: -Poverty: because most of the poor don’t have enough money to get education and food‚ so they will do whatever for getting food without thinking well like rob or steal someone. -Imbalance between rich and poor: As we can see in our social‚ there are a lot of poor people and the gap between rich and poor is very far. The rich have many cars in their house but the poor don’t have any cars even food to eat. Thus they will think it is not fair and try to
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simple bath bomb recipes have: baking soda‚ citric acid‚ and cornstarch. When baking soda and citric acid are mixed together with some water‚ they undergo a chemical reaction. Specifically‚ this reaction involves acid-base chemistry‚ since the baking soda—also known as sodium bicarbonate (NaHCO3)—is a weak base‚ and citric acid (C6H8O7) is a weak acid. This reaction is shown in Equation 1‚ below. As you can see from Equation 1‚ the acid-base reaction produces carbon dioxide (CO2) gas. This gas is what
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spectrophotometer at 605nm‚ and the rate of linear decrease in absorbance over time represents the number of electrons flowing through the electron transport chain reflecting the relative rate of photosynthesis. Chloroplasts only absorb certain wavelengths in the electromagnetic spectrum‚ the blue followed by the red are the two main wavelengths absorbed (Melis‚ et al.‚ 1987). The experiment was designed to investigate which wavelengths would result in the highest rate of photosynthesis. Chlorophyll a
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