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Key concepts and summary
The ratios of the rate of change in concentrations of a reaction are equal to the ratios of the coefficients in the balanced chemical equation. The sign of the coefficient of X is positive when the concentration increases and negative when it decreases. We learned to approach three basic types of equilibrium problems. When given the concentrations of the reactants and products at equilibrium, we can solve for the equilibrium constant; when given the equilibrium constant and some of the concentrations involved, we can solve for the missing concentrations; and when given the equilibrium constant and the initial concentrations, we can solve for the concentrations at equilibrium.
Chemistry end of chapter exercises
A reaction is represented by this equation:
(a) Write the mathematical expression for the equilibrium constant.
(b) Using concentrations ≤1
M , make up two sets of concentrations that describe a mixture of A, B, and C at equilibrium.
[A] = 0.1
M , [B] = 0.1
M , [C] = 1
M ; and [A] = 0.01, [B]= 0.250, [C] = 0.791.
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A reaction is represented by this equation:
(a) Write the mathematical expression for the equilibrium constant.
(b) Using concentrations of ≤1
M , make up two sets of concentrations that describe a mixture of W, X, and Y at equilibrium.
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What is the value of the equilibrium constant at 500 °C for the formation of NH
3 according to the following equation?
An equilibrium mixture of NH
3 (
g ), H
2 (
g ), and N
2 (
g ) at 500 °C was found to contain 1.35
M H
2 , 1.15
M N
2 , and 4.12
10
−1
M NH
3 .
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Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures.
What is the equilibrium constant for the reaction if a mixture at equilibrium contains gases with the following concentrations: CH
4 , 0.126
M ; H
2 O, 0.242
M ; CO, 0.126
M ; H
2 1.15
M , at a temperature of 760 °C?
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A 0.72-mol sample of PCl
5 is put into a 1.00-L vessel and heated. At equilibrium, the vessel contains 0.40 mol of PCl
3 (
g ) and 0.40 mol of Cl
2 (
g ). Calculate the value of the equilibrium constant for the decomposition of PCl
5 to PCl
3 and Cl
2 at this temperature.
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At 1 atm and 25 °C, NO
2 with an initial concentration of 1.00
M is 3.3
10
−3 % decomposed into NO and O
2 . Calculate the value of the equilibrium constant for the reaction.
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Calculate the value of the equilibrium constant
K
P for the reaction
from these equilibrium pressures: NO, 0.050 atm; Cl
2 , 0.30 atm; NOCl, 1.2 atm.
The equilibrium equation is
K
P = 1.9
10
3
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When heated, iodine vapor dissociates according to this equation:
At 1274 K, a sample exhibits a partial pressure of I
2 of 0.1122 atm and a partial pressure due to I atoms of 0.1378 atm. Determine the value of the equilibrium constant,
K
P , for the decomposition at 1274 K.
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A sample of ammonium chloride was heated in a closed container.
At equilibrium, the pressure of NH
3 (
g ) was found to be 1.75 atm. What is the value of the equilibrium constant
K
P for the decomposition at this temperature?
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Questions & Answers
how does Neisseria cause meningitis
is the branch of biology that deals with the study of microorganisms.
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
How bacteria create energy to survive?
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
which site have a normal flora
Many sites of the body have it
Skin
Nasal cavity
Oral cavity
Gastro intestinal tract
Safaa
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Binomial nomenclature
adeolu
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Source:
OpenStax, Chemistry. OpenStax CNX. May 20, 2015 Download for free at http://legacy.cnx.org/content/col11760/1.9
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