# Can someone do my homework?

Anonymous
timer Asked: Oct 19th, 2018
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I need help doing this exercises for my CHM/151 class. The course book name is Chemistry, OpenStax College 2015 Chapter 13, Fundamental Equilibrium Concepts. The homework consists of six exercises that have to do with Chapter 13. 13.1 Chemical Equilibria 13.2 Equilibrium Constants 13.3 Shifting Equilibria: Le Châtelier’s Principle 13.4 Equilibrium Calculations. I need step by step equations with the solutions, and these have to be clear enough for me to understand. The file contains all the specifications from my teacher. "Complete the following problems. Submit the solutions showing all work, step-by-step (when appropriate) in an MS Word document." I need this by Monday, October 22, 2018, morning at 9:00 am Eastern time.

CHM/151 Week 2 Problem Set Complete the following problems. Submit the solutions showing all work, step-by-step (when appropriate) as either an MS Word document or handwritten and scanned as a PDF document. 1. Write the chemical equilibrium expressions in terms of the concentrations of the reactants and products for the following reactions: 2𝐻𝐶𝑙(𝑔)→𝐻2(𝑔)+𝐶𝑙2(𝑔) 𝐶𝑎𝐶𝑂3(𝑠)→𝐶𝑎𝑂(𝑠)+𝐶𝑂2(𝑔) 3𝐻𝑔2(𝑠)+2𝐹𝑒3+(𝑎𝑞)→3𝐻𝑔2+(𝑎𝑞)+2𝐹𝑒(𝑠) 2𝑁𝑎𝐶𝑙(𝑠)+𝐵𝑟2(𝑔)→2𝑁𝑎𝐵𝑟(𝑠)+𝐶𝑙2(𝑔) 5𝐻𝐶𝑂𝑂𝐻(𝑎𝑞)+2𝑀𝑛𝑂4−(𝑎𝑞)+6𝐻+(𝑎𝑞)→5𝐻2𝐶𝑂3(𝑎𝑞)+2𝑀𝑛2+(𝑎𝑞)+3𝐻2𝑂 2. Consider the chemical reaction given in the last part of the previous problem: 5𝐻𝐶𝑂𝑂𝐻(𝑎𝑞)+2𝑀𝑛𝑂4−(𝑎𝑞)+6𝐻+(𝑎𝑞)→5𝐻2𝐶𝑂3(𝑎𝑞)+2𝑀𝑛2+(𝑎𝑞)+3𝐻2𝑂 Presume that this reaction is exothermic. Presume that the system above is initially at equilibrium. What direction is equilibrium shifted (towards reactants or towards products) when the following are done? If equilibrium is not impacted, say “no impact”. • Increase the pH of the equilibrium mixture (add more H+) • Add more 𝐻𝐶𝑂𝑂𝐻 to the equilibrium mixture • Cool the equilibrium mixture • Add H2CO3 to the equilibrium mixture 3. Formic acid, (HCOOH) is a moderately strong acid in the saliva of ants that makes their bites so painful. It partially ionizes when mixed with water according to the following chemical reaction: 𝐻𝐶𝑂𝑂𝐻+𝐻2𝑂→𝐻3𝑂++𝐻𝐶𝑂𝑂− Write down the expression for the reaction quotient when formic acid is mixed with water as shown above. If at equilibrium the concentration of HCOOH is 0.6 M, HCOO- is 0.3 M and H+ is 3.6 x 10-4, calculate the equilibrium constant Ka. 4. Ammonia is an important chemical used in many industrial-level chemical syntheses. It is manufactured on a massive scale through the reaction of nitrogen with hydrogen as shown below. 𝑁2(𝑔)+ 3𝐻2(𝑔)→2𝑁𝐻3(𝑔) Write down the expression for the reaction quotient of this reaction. The gas phase equilibrium constant for this chemical reaction is Kp = 4.9 x 10-5. If the initial concentrations are: [N2] = 140 atm [H2] = 220 atm [NH3] = 150 atm What is the reaction quotient Q? What direction will the chemical reaction proceed (forwards or backwards)? 5. Consider the following gas phase chemical reaction: 𝐴(𝑔)→2𝐵(𝑔) Write down the expression for the equilibrium constant of this reaction. If the initial concentration of A is 20 atm pressure, the initial concentration of B is 0 atm and the equilibrium constant Kp for the reaction is .001 atm-1, calculate the equilibrium concentration of B. 6. 𝑁𝐻4𝐶𝑁 (a solid) is warmed in a chamber and the following reaction occurs: 𝑁𝐻4𝐶𝑁 (𝑠)→𝐻𝐶𝑁(𝑔)+𝑁𝐻3(𝑔) When the reaction chamber initially containing only 𝑁𝐻4𝐶𝑁 is warmed the pressure of HCN was found to be 0.6 atm. • a. Write down the equilibrium expression Kp for this reaction. • b. Based on the information provided, determine the value of Kp.

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madushan
School: University of Maryland

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