‘HOW DOES CONCENTRATION AFFECT THE RATE OF REACTION?’ SANIA HUSSAIN CANDIDATE NUMBER:5093 Contents The aim – PG 1 Introduction – PG 1 Theories – PG 1‚ 2 Prediction – PG 2‚ 3 Safety – PG 3 Strategy – PG 3‚ 4 Method – PG 5‚ 6‚ 7 Preliminary – PG 7 Actual experiment and graphs – PG 7+ Chemistry coursework Hypothesis/Aims The aim of the investigation is to see how different concentrations of hydrochloric acid affects the rate at which hydrogen gas is produced
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The Law of Conservation of Mass Goals: 1. To identify the parts of a chemical equation. Students need to identify subscripts‚ coefficients‚ reactants‚ products‚ chemical formulas‚ and chemical symbols 2. To appreciate that scientific discoveries are often the result of inquiry. 3. to distinguish between an element‚ a compound‚ and a mixture (and between heterogeneous and homogeneous mixtures) 4. To balance a chemical equation in order to prove that the Law of Conservation of Mass works quantitatively as well as conceptually
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digging. What is x? Given this scenario the Pythagorean Theorem would be the strategy we use to solve for x. I started off with the Pythagorean Theorem. I then plugged the binomials into the Pyth. Thrm. Next I moved (2+6)^2 to le left of the equation by subtracting (2x+6)^2 from both sides. I then squared the expression Next I foiled the expression by multiplying and combining like terms. I multiplied -1 by each term inside the parentheses and then removed the parentheses around the expression
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water according to the following equation: → 2Agϩ(aq) ϩ CrO42Ϫ(aq) Ag2CrO4(s) ← Which of these correctly represents the equilibrium expression for the above equation? 2[Agϩ] ϩ [CrO 42Ϫ] [Agϩ]2[CrO42Ϫ] [Ag2CrO4] (a) ᎏᎏ (b) ᎏ ᎏ (c) ᎏ ᎏ 1 Ag2CrO4 [Agϩ]2[CrO42Ϫ] [Agϩ]2[CrO42Ϫ] (d) ᎏᎏ 2[Ag2CrO4] 2. Are pure solids included in equilibrium expressions? Explain your answer. 3. Write the equilibrium expression for the following hypothetical equation: → 2C(aq) ϩ 3D(aq) 3A(aq) ϩ B(aq)
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will shift to the side with more gas molecules. If the temp. increase‚ the equilibrium will shift away from the heat. The opposite would happen when the temp. decrease. Decrease temp. will shift toward the heat. (Heat is determined by whether the equation is an endo or exothermic. Endothermic consume heat‚ exo. generates heat. Equilibrium constants can be obtained from the ratio written from equilibrium expressions. The ratio of product over reactant will give K (known as the constant). If k is greater
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the Symbol button on the Symbols Group > Choose the appropriate symbol. 5. Equations Word 2007 also allows you to insert mathematical equations. To access the mathematical equations tool: * Place your cursor in the document > Click Insert Tab > Click the Equation Button > Choose the appropriate equation and structure or click Insert New Equation * To edit the equation > click the equation > Design Tab 6. SPELLING AND GRAMMAR Place the cursor at the beginning of
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Study material CHEMISTRY CLASS: XII KENDRIYA VIDYALAYA SANGATHAN LUCKNOW R E G I O N 2009-2010 Study Material Class XII -Chemistry SHRI RANGLAL JAMUDA IAS‚COMMISSIONER CHIEF Patron KENDRIYA VIDYALAYA SANGTHAN NEW DEHLI SHRI M.S Chauhan Asst. Commissioner Patron Kendriya Vidyalaya Sangthan Lucknow Region SHRI S.S. Rawat Guidance Smt. A.N Siddiqui (Education officer) (Education officer) SHrI K.‚M. Bhatnagar (Education officer) Co-ordinator SHRI. T. Singh Principal K.V. No. 2
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model is made up of the velocity‚ and height. The equation is -16t2 + vt + h. V is equivalent to the velocity‚ and h is equal to the height. The vertical motion falls under the influence of gravity. As the force due to gravity may be opposite to the direction of motion‚ there exists the possibility that the body under force of gravity reverses its direction. It is‚ therefore‚ important to understand that the quantities involved in the equations of motion may evaluate to positive or negative values
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See that document for the complete discussion. Here we summarise that document in a form suitable for printing. Equations of Motion In the absence of air resistance: where: s = the position at time t s0 = the position at time t = 0 v0 = the speed at time t = 0 g = the acceleration due to gravity. When there is air resistance‚ it is characterised by a constant : Then the equation of motion is approximately: The Apparatus The precision of the metal scale is one part in 4000. The accuracy
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Catherine U. Toledo Detailed Lesson Plan I. Objectives: At the end of the lesson‚ the first year section one students should be able to: * Recognize key word that indicates certain mathematical operations. * Translate verbal statement into equations. * Identify the basic steps in solving word problem. * Solve age problems in at least 5 minutes. * Show the process in solving the Age problems. * Demonstrate honesty through solving and checking Age problems. II. Subject Matter:
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