About 16 - of the acid in a 0-10 M solution of a weak acid dissociates.docx
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About 16 % of the acid in a 0.10 M solution of a weak acid dissociates to form ions. 1. What is the OH? concentration? Express your answer using two significant figures. 2.What is the pH of the solution? Express your answer using two decimal places. Solution Let the weak acid be HA It dissociates as: HA <—> H+  +  A- [H+] = 16 % of [A] = 16*0.10/100 = 0.016 M 1) use: [OH-] = Kw/[H+] Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC [OH-] = (1.0*10^-14)/[H+] [OH-] = (1.0*10^-14)/(1.6*10^-2) [OH-] = 6.25*10^-13 M Answer: 6.25*10^-13 M 2) use: pH = -log [H+] = -log (1.6*10^-2) = 1.80 Answer: 1.80 .
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![About 16 % of the acid in a 0.10 M solution of a weak acid dissociates to form ions.
1. What is the OH? concentration?
Express your answer using two significant figures.
2.What is the pH of the solution?
Express your answer using two decimal places.
Solution
Let the weak acid be HA
It dissociates as:
HA <—> H+  +  A-
[H+] = 16 % of [A]
= 16*0.10/100
= 0.016 M
1)
use:
[OH-] = Kw/[H+]
Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC
[OH-] = (1.0*10^-14)/[H+]
[OH-] = (1.0*10^-14)/(1.6*10^-2)
[OH-] = 6.25*10^-13 M
Answer: 6.25*10^-13 M
2)
use:
pH = -log [H+]
= -log (1.6*10^-2)
= 1.80
Answer: 1.80](https://image.slidesharecdn.com/about16-oftheacidina0-10msolutionofaweakaciddissociates-230128035312-381e8c93/85/About-16-of-the-acid-in-a-0-10-M-solution-of-a-weak-acid-dissociates-docx-1-320.jpg)
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Solution
Option (C) is incorrect.
Animal cells DO lack cell walls, but they have cell membranes.
However, option (B) is also incorrect because most animals are diploid and reproduce with meiosis and mitosis. BUT Animal gametes are haploid and reproduce by mitosis (after being produced through meiosis).
.
All of the following income items are inclusive in an employee gross i.docx
All of the following income items are inclusive in an employee gross income except
Severance pay for the cancellations of employment
Vacation allowance
Worker compensation payments
Moving expense reimbursements
All of the following income items are inclusive in an employee gross income except
Severance pay for the cancellations of employment
Vacation allowance
Worker compensation payments
Moving expense reimbursements
Severance pay for the cancellations of employment
Vacation allowance
Worker compensation payments
Moving expense reimbursements
Solution
Vacation allowance
.
All of the following statements are true about corporate reorganizatio.docx
All of the following statements are true about corporate reorganization except:
Taxable amounts for shareholders are classified as a dividend or capital gain.
Reorganizations receive treatment similar to corporate formations under
Solution
Reorganizations receive treatment similar to corporate formations under
.
Air- initially at 220 kPa and 450 K undergoes a polytropic state chang.docx
Air, initially at 220 kPa and 450 K undergoes a polytropic state change to 374 kPa and 495 K. What is the polytropic exponent of this process?
and
Saturated water vapor is contained in a rigid container. Heat is then added until the the pressure and temperature become 861.818 MPa and 400 ?C, respectively. What was the initial temperature of the steam?
?C
Solution
PV n =C
PV=nRT
V= nRT/P
P( nRT/P) n =C
P 1 (T 1 /P 1 ) n =P 2 (T 2 /P 2 ) n
(T 1 P 2 /T 2 P 1 ) n =P 2 /P 1
n= ln(P 2 /P 1 )/ln(T 1 P 2 /T 2 P 1 )= 1.218944
.
After winning the 2001 election- the new governor of Virginia- Mark Wa.docx
After winning the 2001 election, the new governor of Virginia, Mark Warner, named Phillip Shucet to head the Virginia Department of Transportation (VDOT). Shucet was eager to bring his private-sector experience and management experience to VDOT, and he knew it would be a challenge. VDOT was renowned for its engineering innovation and cutting-edge research. More recently, though, the department
Solution
Part 1
1.
According to Classical approach of management theory , employees of a company have only economical and physical needs. Job satisfaction or social needs holds negligible importance for these employees. Classical approach included several theories comprising Taylor
.
Action Center activation Administrative Tools Aero applets Computer Co.docx
Action Center
activation
Administrative Tools
Aero
applets
Computer
Computer Management
context menu
Control Panel
desktop
Device Manager
extension
Flip 3D
Folders list
interface
Jump List
library
logon screen
Microsoft Management Console (MMC)
My Computer
My Documents
My Network Places
Navigation pane
Network
notification area
Performance
Performance Monitor
pinned application
Quick Launch toolbar
Recycle Bin
Reliability and Performance Monitor
service
Start button
SystemRoot
System Tools
system tray
taskbar
transparency
User’s Files
Welcome screen
Windows Explorer
Windows Sidebar
x64
x86
Which key term fits in the sentence?
You can place handy Gadgets that display useful information on the __________________.
Solution
Windows Sidebar
.
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