Chemical Equilibrium: Le Chatelier Principle By Sarah Ramos and Kristina Todorovic Chemistry 203 DEN Dr. Mohamed El-Maazawi Part A. Acid-Base Indicators Purpose In this part of the experiment‚ we will find a reagent that will shift the acid-base equilibrium reaction described by Equation (2) in one direction and then a second reagent that will cause the equilibrium position to shift back in the opposite direction. Introduction An acid–base indicator
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A magic square is an arrangement of the numbers from 1 to n2 in an n x n matrix‚ with each number occurring exactly once‚ and such that the sum of the entries of any row‚ any column‚ or any main diagonal is the same (Alejandre)‚ called the magic constant or sum. The magic sum can be found using the formula (n(n2 + 1))/2 for any n x n matrix. There are many different variations of magic squares‚ of which‚ some have more ways of finding the magic sum in the square and others use geometric shapes or
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Name:David B. Victorioso Year/section:IV-Acacia Date:Saeptember 16‚2013 Teacher:Mrs.Noceda Age Problem Problem 1 An eagle is 4 times as old as a falcon. Three years ago‚ the eagle was 7 times as old as the falcon. Find the present age of each bird. Solution x = falcon’s age now 4x = eagle’s age now {the eagle is 4 times as old as falcon} x - 3 = falcon’s age 3 years ago 4x - 3 = eagle’s age 3 years ago 4x – 3 = 7(x – 3) {three years ago‚ eagle
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Chemistry 12 Review Sheet on Unit 2 Chemical Equilibrium 1. What two things are equal at equilibrium? _________________________________ and ________________________________ 2. Consider the following potential energy diagram: a) Which reaction‚ forward or reverse‚ will be affected more by an increase in temperature? _______________________________________ b) Write a thermochemical equation for the forward reaction using the numerical value for the heat. Answer _______________________________________________________________
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By separating variables‚ find the solution of the following initial value problems in explicit form: 1. y′ = 2x/(y + x2 y)‚ y(0) = −2. 2. y′ = xy3 (1 + x2 )−1/2 ‚ y(0) = 1. 3. y′ = 3x2 /(3y2 − 4)‚ y(1) = 0. (Leave solution as a cubic equation for y.) 4. y′ = (2 − ex )/(3 + 2y)‚ y(0) = 0. 5. Find the solution of the following initial value problem with x = x(t) and x = dx/dt: ˙ x + 2x = te−2t ‚ ˙ 6. Consider the initial value problem: 2 1 x + x = 1 − t‚ ˙ 3 2 x(0) = x0 . x(1) = 0. Find the value
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gas plus magnesium chloride. The combined gas law explains the relationship among the pressure‚ temperature‚ and volume of an enclosed gas. Also the combined gas law allows you to do calculations for situations in which only the amount of gas is constant. All of these scientific terms you will have to know to successful perform this lab Materials: Magnesium ribbon A stopper Hydrochloric acid Eudiometer 1000ml beaker Ring stand Utility clamp Water 600ml beaker Goggles Apron Scissors
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1. The mole is a counting unit of chemistry that denotes a specific amount 2. Avogadro created this unit 3. He used 12 grams of carbon to figure out his unit‚ weighed out 12 grams and did multiple test calculations 4. Abbreviation for the mole is mol 5. Avogadro’s number is 6.022 x 10^23 6. 1 mole= 6.022 x 10^23 7. Avogadro used the number to create molar mass 8. Molar mass is the weight of an atom in 1 mol‚ g/mol is the unit 9. MM is the abbreviation for molar mass 10. A mole is defined
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Unit 18 B Study Guide 1. Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A) 1.59e–2 B) 2.53e–2 C) 6.64e–17 D) 2.01e–3 E) 2.01e–2 2. The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A) Nothing. B) HY is stronger than HX. C) HX is stronger than HY. D) The acids have equal strengths. E)
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Kevin Flecker NT-1110 4/26/2014 Pentium Flaw The Pentium FDIV bug was a bug in the Intel P5 Pentium floating point unit (FPU). Because of the bug‚ the processor would return incorrect results for many calculations used in math and science. Intel blamed the problem on a few missing entries in the lookup table used by the company. The error was discovered by Professor Thomas R. Nicely at Lynchburg College‚ Virginia‚ USA. The error was rarely encountered by users (Byte magazine estimated that
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rederick smith The Golden Ratio March 31 2011 1. The introduction: Hello my name is Frederick Smith‚ I will be speaking you about a fascinating thing that is in everything‚ it’s a part of you‚ it created you & its not just in you‚ its all around you. Its also in all plants and in all animals. Take for example an octopus has eight tentacles hence the name “octo’~pus‚ each one of its tentacles has the exact number of suckers on it and each tentacle is the same length pretty amazing right...
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