chemistry

I have been at this question for at least three hours now.

Consider the chemical system below.
2 NOCl(g) 2 NO(g) + Cl2(g) K = 1.6 10-5
What is the equilibrium concentration of nitrogen monoxide, [NO], given each of these initial conditions?
(a) [NOCl]0 = 0.480 M; [Cl2]0 = 0.0 M
0.00975949307 M <--this is the answers I keep getting, but it's wrong I guess

(b) [NOCl]0 = 1.490 M; [Cl2]0 = 1.99 M
M

(c) [NOCl]0 = 2.13 M; [Cl2]0 = 1.06 M
M

The formula uses ICEA and for the first one at least, I have to use 1.6x10^-5= x(2x)^2/0.480^2
I plug in the numbers, WRONG. Please help!

  1. 👍 0
  2. 👎 0
  3. 👁 221
  1. K = (Product/Reactant)
    1.6*10^-5 = (x)^2 * 0 )/(.480)^2
    x = 0.00191833261

    Someone check this

    1. 👍 0
    2. 👎 0
  2. If this is ICEA, you forgot the 2x^2.....should be getting something like 4x^3 on the top w/ the products.
    I'm actually getting the same number as the person asking this question

    1. 👍 0
    2. 👎 0
  3. 2 NOCl(g)-> 2 NO(g) + Cl2(g) K = 1.6 10-5

    note that units are missing for K, which I assume as mol dm^-3

    The equilibrium constant is given by

    K=[NO]^2[Cl2]/[NOCl]^2

    start with [NOCl]= 0.480 mol dm^-3
    at equilibrium
    [NOCl]=0.480-x
    [NO] = x
    [Cl2] =x/2 (because half number of moles wrt NOCl.)

    hence

    (x)^2(x/2)/(0.480-x)^2= 1.6 x 10^-5

    assume x is small

    x^3/0.960 = 1.6 x 10^-5

    x^3=0.00001536

    x=0.0249

    part b)

    start with [NOCl]= 0.480 mol dm^-3
    and [Cl2]=1.99 mole dm^-3
    at equilibrium
    [NOCl]=0.480-x
    [NO] = x
    [Cl2] =1.99+x/2 (because half number of moles wrt NOCl.)

    hence

    (x)^2(1.99+x/2)/(0.480-x)^2= 1.6 x 10^-5

    assume x is small

    x^2(1.99)/0.960 = 1.6 x 10^-5

    x^2=7.72E-6

    x=0.00278

    x=0.0249

    (which is the result expected as higher [Cl2] will drive the equilibrium to the left and hence lower [NO] then in a).

    c) repeat the process of b)

    I have left out units which will need to be inserted. Also please check my calculator maths.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: On a week night, what

    asked by Anonymous on August 18, 2014
  2. advanced alh

    The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: About what proportion of

    asked by Anonymous on June 3, 2016
  3. Chem

    Chemical reactions contain which of the following? A chemical change B involve the motion of electrons C formation of chemical bonds D all of the above D?

    asked by Anonymous on June 23, 2020
  4. physics/chemistry(Thermodynamics)!!!!!helppppp!

    In a certain chemical process,a lab technician supplies 254 j of heat to a system. At the same time,73 j of work are done on the system by iys surroundings.What is the increase in the internal energy of the system?

    asked by duke on May 15, 2013
  5. Math

    Hello, could someone check my answers please? The Equation; $4.50h = 20.00 shows the cost to play h hours of miniature golf how many hours of golf were played? Answer choices: A: 3 HOURS B:4 HOURS C: 4.8 HOURS D: 6.4 HOURS My

    asked by Rose on March 16, 2018
  1. Math

    Question 2 For the function f(x) = 3x2-2x-7, find f(2). Answer f(2) = 13 f(2) = 25 f(2) = 1 f(2) = 1/2 3 points Question 3 One day you work 3 hours and your boss gives you $22. Another day after working 4 hours your boss gives you

    asked by adam on May 18, 2012
  2. Algebra

    For a nonsmoker, the biological half-life of theophylline is 8 hours. Find the amount of the drug retained in a nonsmoker's system 18 hours after taking a one-unit dose. (Round your answer to three decimal places.)

    asked by cindy on March 27, 2016
  3. Math

    Brian was training to run a marathon. During the three day period before the race he decided he would train for 11 hours. If he trained for 2 3/5 hours first day and 2 9/10 second day, how many hours would he need to train third

    asked by Feather on December 14, 2016
  4. Science

    Hormones and Homeostasis 1) The human endocrine system is made up of which of the following structures? :Vessels. :Receptors. :Glands.*** :Chambers. 2. Which of the following best describes the function of the endocrine system?

    asked by TheLOUDEST_0430 on February 27, 2015
  5. math

    If Sue worked 6 3/4 hours on Monday, 4 hours on Tuesday, 7 3/4 hours on Wednesday, 8 hours on Thursday, and 5 1/2 hours on Friday, calculate her weekly wage at $7.20 per hour.

    asked by justin on April 8, 2014
  6. math

    Alice is working 2 jobs to save up money for a trip. She works at the ice cream shop for $9 an hour and babysitting for $12 an hour. She needs to earn at least $200 per week and can only work 20 hours per week. Write a system of

    asked by amy on November 15, 2016

You can view more similar questions or ask a new question.