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Experiemental Chemistry II, Test 1 review

by: Mikaela lake

Experiemental Chemistry II, Test 1 review C-126

Marketplace > Indiana University Purdue University - Indianapolis > Chemistry > C-126 > Experiemental Chemistry II Test 1 review
Mikaela lake

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About this Document

Sample problems, vocab and conceptual questions from the first four labs with answer key.
Experimental Chemistry II
Marie Nguyen
Study Guide
Chemistry, Chemical Kinetics, colligative properties, crystalline
50 ?




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This 4 page Study Guide was uploaded by Mikaela lake on Friday September 30, 2016. The Study Guide belongs to C-126 at Indiana University Purdue University - Indianapolis taught by Marie Nguyen in Fall 2016. Since its upload, it has received 113 views. For similar materials see Experimental Chemistry II in Chemistry at Indiana University Purdue University - Indianapolis.


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Date Created: 09/30/16
Lab 1: Excel lab 1) Match word to definition 1. Ordinate 2. Extrapolate 3. Dependent variable 4. Abscissa 5. Interpolate 6. Independent variable a. To add a new value within a set of existing values. b. The Y value in a pair of coordinates. c. The variable purposefully changed throughout the experiment d. The x value in a pair of coordinates. e. The variable that is not being manually controlled, is often the result of the experiment. f. To pull a value from outside of the collected data’s range. 2) What is the slope of the gas law if moles and volume are constant? *look over graphs from first experiment* Lab 2: Crystalline structures 1)A body centered cell has ___ atoms. a) 1 b) 2 c) 4 d)6 2) What is the coordination number of face centered unit cells? a)6 b)8 c)10 d)12 3)Match cubic cell type with length equation 4r 1) Primitive a) l=√3 2) Body centered b) l = 2r 3) Face centered c) l =√2 4) Find the percent occupied volume of a body centered cubic cell with the length of 1.97 angstroms. 5) What type of unit cell does Cobalt crystallize? The density of the crystal is 195.7 g/cm^3. The side of the unit cell is 1.32A. Lab 3: colligative Properties 1)Colligative properties change depending on a) What the solute is b) how many molecules are present c) neither a or b 2) What is the i value for lead nitrate? Pb(NO ) ? 3 2 a) 0 b)1 c)2 d)3 e)4 3) What is the molality of a NaCl solution if the final boiling point for water was 105.4 degrees celsius? Use .52 for kb of water. 4) what is the weight % of NaCl in problem 3? 5) How many grams of ethylene glycol was used if the new boiling point of a solution is 106.7 degrees celsius?( assume 100 mL of solution and d=1g/mL) 6) Match 1: nonelectrolyte a) moles of solute/ Kg of water 2: nonvolatile b) substance that does not readily evaporate. 3: molality c)molecule completely dissociate. 4: strong electrolyte d) molecule does not dissociate. Lab 4: Chemical Kinetics 1) What order does the graph of 1/concentration vs time correspond to? a) First order b) second order c) third order d) fourth order 2) what happens to the rate of reaction when a first order reactant is doubled? a) Stays the same b) doubles c) quadruples 3) What value does the linear slope of blue dye reveal? a) The order of blue dye b) k observed c) k of overall reaction 4) What does the change in slopes tell you about bleach? a) The order of bleach b) k observed c) k of overall reaction 5) What is the concentration if the %T is 67? 6) Concentration of A= 6.35 1* , concentration of B= 7.99 10 b*th reactants have an order of 1. The linear slope of A was .0063, Find the rate of reaction. (make sure you find the right K value). *These numbers may seem unreasonable due to me making the problems up but if you used the correct process you should get the right anwer Answer key Lab 1 1) 1:F, 2:B, 3:E, 4:D, 5:A, 6:C 2) slope = nR V Lab 2 1) B 2) D 3) 1:B, 2:A, 3:C 2*(4/3πr ) 4) 68% using l = volume of a sphere/volume of a cube. I multiplied the top by 2 because there are 2 atoms in a body centered cube. 5) Body centered. (find grams per cube using density, then divide that by grams per atoms) you should get around 2. Lab 3 1) B 2) D 3) 5.19 4) 23.3% 5) 79.97 g 6) 1:D, 2:B, 3:A, 4:C Lab 4 1) C 2) B 3) B 4) A −6 5) Concentration= 1.26 1* 6) 2.56*10 −8 M s1−1 use K=k observed[B] then use new K value in rate equation.


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