Chemistry F332 Notes Ions in solids and solutions: Structure of an ionic lattice (Sodium Chloride): * Consists of sodium ions (Na+) surrounded by six chloride ions (Cl-) * Chloride ions also surrounded by six sodium ions. * Held together by attraction of oppositely charged ions. * Giant ionic lattice. * Electrostatic bonds hold lattices together. * Structure is simple cubic. * Some ionic crystals contain water. * Known as water of crystallisation. * These crystals
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Experiment 4: Conductivity of electrolyte solutions (Dated: October 29‚ 2009) I. INTRODUCTION Pure water does not conduct electricity‚ but any solvated ionic species would contribute to conduction of electricity. An ionically conducting solution is called an electrolyte solution and the compound‚ which produces the ions as it dissolves‚ is called an electrolyte. A strong electrolyte is a compound that will completely dissociate into ions in water. Correspondingly‚ a weak electrolyte dissolves
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CAT 2007 Solutions Section I 1. Note that the price of Darjeeling tea remains constant after the 100th day (n=100). If the prices of the two varieties of tea become equal before n = 100‚ then 100 + 0.1n = 89 + 0.15n ∴ n = 220‚ which is not possible. (Since n has been assumed to be less than 100) ∴ The prices of the two varieties will be equal after n = 100‚ i.e.‚ when the price of Darjeeling tea = 100 + 0.1 × 100 = 110 ∴ 89 + 0.15n = 110 ∴ n = 140 2007 is not a leap year. Number of days till 30th
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Running Head: SFBT Incorporating the Solution Focused Brief Therapy Model with Teen Substance Abusers in Counseling Abstract This paper serves as a tool for discussion and is divided into four parts: to begin with‚ a brief description of the Solution-Focused Brief Therapy approach is provided. Then provided is a description of the history and development of this therapeutic approach including common developmental and environmental factors. Next an overview of the prevalence of teen
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Joscely Garris Professor Vinh Hoang CHEM 1151L – 254 25 October 2013 Preparation of Viscous Solution This report discusses an experiment to study the relationship of solute/solvent and the calculations involved to measure the concentration of the solution. The first experiment to take place is the preparation of a salad dressing using xanthan gum solution‚ water and oil. Commonly used as a food thickening agent‚ Xanthan gum is a large molecule composed of several saccharides linked together
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HW 1 - Solutions cs171 1. (Exercise 2.3 from RN) For each of the following assertions‚ say whether it is true or false and support your answer with examples or counterexamples where appropriate. (a) An agent that senses only partial information about the state cannot be perfectly rational. False. The vacuum-cleaning agent from Section 2.2.1 is rational but doesn’t observe the state of the square that is adjacent to it (b) There exist task environments in which no pure reflex agent can behave rationally
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Effects on Same Sex School Does anyone think about what is same sex school? Why any students want to go there? Both single sex school and co-ed school have advantages and disadvantages. If we were parents‚ we would think that which school is better to let children go. Some of them do not care about the issue‚ but it may happen some problems to their children. In other word‚ if parents think about it carefully‚ their children will be successful. Going to same sex schools have had several positive
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The Role of the S.S. in the Holocaust All along people have said that Hitler did the Holocaust. This statement is not entirely true‚ and it was his soldiers did. They marched under the Nazi orders‚ and exterminated men‚ women‚ and children alike. The SS started out with humble beginnings. They were founded and started by Adolf Hitler himself. They were started with no intent to harm or kill‚ but to protect Hitler and his fellow party members. They had 300 members in the beginning. They
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Identify the solution(s) of the system of equations‚ if any. -4x - 2y = 12 6y = -12x - 36 Hint X no solution (0‚ -3) (-3‚ 0) infinitely many solutions 5. Identify the solution(s) of the system of equations‚ if any. x + 5y = 5 4x - 5y = 0 Hint X (1‚5/4 ) (1‚ 4/5) (5/4‚ 1) (4/5‚ 1) 6. Identify the solution(s) of the system of equations‚ if any. 6x + 2y = 8 y = 5 - 5x Hint X (2.5‚ –0.5) (2.5‚ 0.5) (–0.5‚ 2.5) (0.5‚ 2.5) 7. Identify the solution(s) of the
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Problem/Solution Unit Plan Lesson 1 Introduction to Problem/Solution - Tell the students that we will be starting the Problem/Solution Unit - Have students work with a partner to answer the questions‚ ‘What is a problem?’ and ‘What is a solution?’ - Come together as a class and discuss their answers to the questions‚ ‘What is a problem?’ and ‘What is a solution?’ ~ Make a list‚ or working (developing) definition of the both ‘problem’ and ‘solution’ on the board - Present “actual” definitions
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