concentrain of sulphuric acid Aim The point of this investigation is to find out the concentration of the sulphuric acid in my experiment. I will do this by titrating the sulphuric acid with sodium carbonate. H2SO4 + Na2CO3 à Na2SO4 + H2O + CO2 Acid + Alkali à Salt + Water + Carbon dioxide Ratio of sulphuric acid to sodium carbonate: H2SO4 : Na2CO3 1 : 1 Concentration of sulphuric acid: H2SO4 is approximately 0.05 - 0.15 moldm-3 The average concentration of the sulphuric acid is: 0.05 + 0.15 =
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log 4. The Ksp of CaSO4 is 4.9 10-5 at 25 C. What is the concentration of Ca2+ in a saturated solution of CaSO4? (Points : 10) 2.4 10-9 M 2.5 10-5 M 4.9 10-5 M 7.0 10-3 M 3.7 10-2 M 5. What is the pH of the buffer that results when 12.5 g of NaH2PO4 and 22.0 g Na2HPO4 are mixed and diluted with water to 0.500 L? (The acid dissociation constants for phosphoric acid are Ka1 = 7.5 10-3‚ Ka2 = 6.2 10-8‚ and Ka3 = 3.6 10-13) (Points
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Rates of Chemical Reaction II Pre-Lab Summary: First we will set up the experiment as shown in Figure 2‚ and then we will fill the trough with room temperature water and record the temperature and we will also add the room temperature water to the buret until it is about 10ml from the top. If there are no leaks in the apparatus‚ we will add 10ml of KI to 15ml of distilled water in a 125ml flask. We will swirl the flask so that it achieves room temperature‚ then we will add 5ml of H2O2 and quickly
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Katie Baldwin Mrs. Testa CP Biology 1A 1‚ November‚ 2017 Exercise To begin‚ exercise is a physical process in which you do physical activities to get your heart rate up. Exercise is important because without it‚ we will not be healthy and our body will not be able to go through their natural processes as easily. Exercise can affect your lungs (by not getting winded as easily)‚ your heart (strengthening it)‚ and many more of your important organs. The article I read was about a new study done by the
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How Music Affects Us and Promotes Health Music is one of the few activities that involves using the whole brain. It is intrinsic to all cultures and can have surprising benefits not only for learning language‚ improving memory and focusing attention‚ but also for physical coordination and development. Of course‚ music can be distracting if it’s too loud or too jarring‚ or if it competes for our attention with what we’re trying to do. But for the most part‚ exposure to many kinds of music has beneficial
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Affecting Reaction Rate Lab Report Objective: To observe and record the different effects of reactants on concentration‚ surface area‚ and temperature‚ on the reaction rates for each. Materials: Refer to the Experiment 18A worksheet Procedure: Refer to the Experiment 18A worksheet Data Table: Mass of 11cm strip of Mg: 0.13g Average mass of 1 cm piece of Mg: 0.0118 Table 1: Effect of Concentration on Reaction Rate Concentration of Acid Reaction Time (s) Reaction Rate (g Mg/s)
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How Do Different Acidic Substances Effect the Mass of the Curd Formed? Purpose The purpose of the experiment was to discover which acidic substances increase or decrease the mass of curd formed with said substances. Background Information Milk is a nutrient-rich liquid found in the mammary glands of mammals. It is the primary source of nutrition for all newborn mammals‚ and is made up of water‚ lactose‚ proteins‚ and minerals. Curds are a solid dairy product achieved by the curdling‚ or coagulation
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Title: Redox Reaction Introduction: Some of the most important chemical reactions are Redox reactions. They are also known as oxidation-reduction reactions. This reaction passes one or more electrons from one species to another. The species that loses electrons are being oxidized while the species that gains electrons are reduced. The reaction occurs simultaneously. Numbers are given to each element in a chemical reaction to help us find out which element is oxidized and which is
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Determining Order from Rates of Reactions AP Chemistry Purpose The focus of this experiment is to recognize that when aqueous solutions of potassium iodate ion (KIO3-) and bisulfite ion (HSO3-) are mixed‚ a series of reactions will occur‚ and the final reaction is signaled by the appearance of a dark blue color. My partners and I investigate how the concentration of the reactants affects the rate of reaction. The purpose of this lab is to find
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The Effects that 1%‚ 4%‚ and 16% Sodium Chloride (NaCl) Concentration Had on the Rate of Reaction of Catecholase Enzymes in a Potato (Solanum tuberosum). Abstract Enzymes are a key component of a cell. They make chemical reactions happen faster because they lower the activation energy to make the chemical reaction occur. Most of the time‚ it is best if enzymes produce as efficiently as possible‚ but in some cases it is better if they do not‚ when dealing with potatoes (Solanum tuberosum).
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