procedure is to weigh out your acid‚ dissolve it in water‚ add a couple drops of the indicator (phenolphthalein)‚ and then add the sodium hydroxide until you note a color change (from clear to pink). When the color change occurs‚ you have added enough base to completely react with the acid (the endpoint). You are allowed three trials‚ and will be graded on accuracy. Lab Questions: 1. HA(aq) + NaOH(aq) NaA(aq) + H2O 2. Trial 1: .1010 M of NaOH = moles of NaOH / 0.0299 L = 0.0030199 mols of NaOH Trial
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This allows us to control a solution so that precipitation of a compound will not occur‚ or to find the concentration needed to cause a precipitate to form. The solubility product which will be determined by this experiment is that of the strong base‚ calcium hydroxide‚ Ca(OH)2. Materials and Equipment Calcium nitrate‚ Ca(NO3)2‚ 0.10 M Sodium hydroxide‚ NaOH‚ 0.10 M (2) 96-well micro-wellplates 50-mL beaker Small dropper bottles for Ca(NO3)2‚ NaOH‚ and H2O (2) disposable pipets for mixing Note
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In labs 4.1‚ 4.2‚ and 4.3‚ the connection between the force of gravity and the type of surface was tested through a series of experiments. In lab 4.1‚ the force of gravity was tested through various surface types‚ including: tabletop‚ waxed paper‚ paper towel‚ fine sandpaper‚ and coarse sand paper. In lab 4.2‚ two different surface types that were tested included: tabletop and coarse sand paper. This lab compared the two averages between both tabletop and coarse sandpaper using different amounts
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Determination of the concentration of ethanoic acid in commercial vinegar Introduction: The aim of the experiment was to determine the molarity of ethanoic acid in table vinegar by titrating a sample with alkali sodium hydroxide (NaOH) with a known concentration of 0.1molL-1. The equation of the reaction between ethanoic acid and sodium hydroxide is as follows: CH3COOH + NaOH CH3COONa + H2O When the titrations end point is determined and volumes of reactants are measured the concentration
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Chemistry AP Chapters 4 and 5 Practice Test 1. Which of these compounds is a weak electrolyte? A. HCl B. CH3COOH (acetic acid) C. C6H12O6 (glucose) D. O2 E. NaCl 2. The balanced net ionic equation between aqueous diethyl ammonium chloride and aqueous potassium hydroxide contains which of the following species? A. KCl(s) B. 2 OH-1 C. (CH3CH2)2NH2 (aq) D. H3O+1 E. (CH3CH2)2NH2+1 (aq) 3. In the chemical reaction 5H2O2 + 2MnO4-
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Acids have a pH less than 7. Alkalis have a pH greater than 7. There are a lot of ways for finding the pH of something. One way is to use litmus paper. The pH paper is able to tell how strong the chemical is‚ whether it is a stronger acid or a stronger base. pH is a measure of the concentration of protons (H+) in a solution. Danish Bio-chemist Soren Peter Lauritz Sørensen introduced his concept in 1909. The p stands for the German potenz‚ meaning power or concentration‚ and the H for the hydrogen ion (H+)
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capable of removing grease or oil stains. It will be used for stains found in cloth. Sodium Bicarbonate is also used as a deodorant and can remove odours. It is also used as a replacement for softener when washing clothes with detergent. It is a weak base with a pH of 8.7. The main materials we will use for the experiment are: Sodium Bicarbonate (Baking Soda) Vinegar Water Oil Related Literature: Joy T. (n.d.). Retrieved from http://www.ehow.com/how_6510638_baking-vinegar-stain- remover-mix
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Monica Mahmoudi 02072798 Bandaruk Mon-Wed 12:45 PH Balance in the Human Body As we all know every solution is either acid or alkaline. Alkaline is often called base. These solutions can be anything from body fluids‚ to fruits‚ vegetables‚ seawater‚ beverages you name it. Acid and alkaline is measured in pH. It starts as low as zero being very acidic and works its way up to fourteen being the most basic. The pH of our stomach is 2‚ obviously to digest food‚ wine is 3.5‚water is 7(neutral)‚ arterial
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cultural city. We have long heard of the famous challenge project there from TV. It said Macau has a great challenge project integrating recreation‚ challenge‚ adventure and stimulation‚ which is 233 meters high from the Macau tower called bungee jumping. We went directly to the Macau tower as soon as we arrived at Macau. During the way on the bus‚ my heart’s beating faster‚ I expected to jump very much‚ while at the same time I felt a little afraid and worried. The tower was really very high
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It approximates the base 10 logarithm of the level of calcite saturation. The Langeleir saturation examines the saturation concept using pH as the main determinant. The LSI obtained can be explained as the pH required to bring the water to equilibrium. Water that indicates
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