affecting the catalytic decomposition of Hydrogen peroxide Please refer to the additional files for tables/graphs. Aim- The purpose of this investigation is to investigate how certain factors affect the catalytic decomposition of Hydrogen peroxide. I will investigate the effect of altering the mass of catalyst used on the rate of the decomposition of Hydrogen peroxide. Introduction- The decomposition of Hydrogen peroxide is a process by which Hydrogen peroxide decomposes into water and Oxygen
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Five year old Danny is in kindergarten. It is playtime and he hops from chair to chair‚ swinging his arms and legs restlessly‚ and then begins to fiddle with the light switches‚ turning the lights on and off again to everyone ’s annoyance--all the while talking nonstop. When his teacher encourages him to join a group of other children busy in the playroom‚ Danny interrupts a game that was already in progress and takes over‚ causing the other children to complain of his bossiness and drift away to
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BLG & Co.‚ CPAs 306 3rd Flr. MSA Second St.‚ Ayala-Alabang‚ Muntinlupa City Philippines SUBSTANTIVE TESTS – PURCHASE/ACQUISITION TRANSACTIONS ASSERTIONS OBJECTIVE PROCEDURES I. Existence Or Occurrence II. Rights and Obligations To determine that recorded purchases are for items that were acquired. To determine that purchases are the entity’s acquisitions and liabilities. For a sample of purchase transactions recorded in the purchases journal‚ trace vouchers to authorized purchase
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reaction between Iodide ions and Peroxodisulphate (VI) ions By the use of an Iodine clock reaction I hope to obtain the length of time taken for Iodine ions (in potassium iodide) to react fully with Peroxodisulphate ions (in potassium Peroxodisulphate). I will do three sets of experiments changing first the concentration of iodide ions‚ then the concentration of Peroxodisulphate ions and finally the temperature of the solution in which the reaction is taking place. From these results‚ I hope to
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ADD/ADHD Research ADHD and ADD ADHD is real in the view of many scientific researchers and families. Attention Deficit/Hyperactivity Disorder (ADD/ADHD) is the most commonly reported childhood behavioral disorder‚ affecting between 3 and 7% of American children. It is characterized by poor attention span‚ impulsive behaviors‚ and hyperactivity in some children. The diagnostic criteria are strictly observational‚ and there are no objective laboratory tests to confirm that diagnosis. Subjective
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Effects of Different Concentration of Catalyse on Hydrogen Peroxide Aim: In this investigation I will try to find how long it takes for the filter paper disc to rise up whilst varying the amounts of concentration of catalyse. Prediction: I predict that the lower the concentration of catalyse the longer it will take for the filter paper disc to rise to the surface of the tube. Equipment: 1. Hydrogen peroxide in a container 2. Flat bottom tube 3. Tweezers 4. Filter paper
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of electrons. 2. An atom can NEVER gain or lose protons 3. The number of protons equals the atomic number NAME:________________________________________ Ion Practice Set 1. What is an ion? 2. What does the number next to the ions signify? Complete the following table‚ using the periodic table in the back of your book. ELEMENT NAME ION SYMBOL NUMBER OF PROTONS NUMBER OF ELECTRONS NUMBER OF ELECTRONS LOST OR GAINED ex Fluorine F- 9 10 gained one 1 2 3 4 5 6 7 8 9 10 11
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Importance of Calcium Ions Alyssa Foels 12 February 2015 Kilfe Calcium is a cation‚ a positively charged atom‚ and it is essential to all living things. It was first discovered in 1808 by Humphrey Davy. When forming an ionic bond with other elements‚ calcium loses electrons to make its valence shell stable. This means that it has more protons than electrons‚ making it have a slight positive charge (Calcium). Calcium has many roles and functions in the human body. Calcium ions are the most abundant
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Lab Experiment # 11 The common ion effect in dissolution and precipitation Equilibria Introduction: Dissolution and precipitation reactions are very important chemical reactions because it is applied to many aspects of the industries in medicine‚ food‚ water etc. The objectives of this laboratory experiment is to become familiar with dissolution and precipitation equilibria‚ develop a lab technique suitable for the determination of the solubility for a sparingly soluble salt‚ Ba(NO3)2 (s) at room
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ADHD/ADD in Pediatrics Children with ADHD In today’s day and age more and more children are being diagnosed with Attention Deficit Disorder/Hyperactivity (ADD/ADHD) and are being prescribe medication to control the disorder. We have people on both sides of the issues that are for and against giving children medication. There will always be people who say kids do not need the medicine to function properly‚ and then we have the people who live by the medication. As a future teacher‚ I would
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