More Fun with Alkalinity Water collected from the Willamette River at the Taylor Water Treatment Plant last October had a pH of 7.4 and an alkalinity of 28.5 mg/L as CaCO3. 1. What is the alkalinity in meq/L? The alkalinity equation is: ALK =[HCO, ]+2[CO, ]+[OH ]–[H* ] This equation can also be written in terms of [H*], equilibrium constants, and the total carbonate concentration (Cr) as follows: where α₁ = A₂ = ALK [HCO3 ] CT (ca) = [CO₂-2] CT Kalka2 [H*]¹² +[H*]K₁+ Kalka2 K₁=10-¹4; K₁₁ =10-6³; K₁₂ = 10-10.3 Note: See pages 63-65 for additional information on the concept of alpha values. 2. What is Cr for the Willamette River Water (more space on the next page)? Kw = α₁C₁ + 2α₂C₁ +₁ −[H*] [H*] = [H*]Kal [H+]² +[H*]K+ Kalka2
More Fun with Alkalinity Water collected from the Willamette River at the Taylor Water Treatment Plant last October had a pH of 7.4 and an alkalinity of 28.5 mg/L as CaCO3. 1. What is the alkalinity in meq/L? The alkalinity equation is: ALK =[HCO, ]+2[CO, ]+[OH ]–[H* ] This equation can also be written in terms of [H*], equilibrium constants, and the total carbonate concentration (Cr) as follows: where α₁ = A₂ = ALK [HCO3 ] CT (ca) = [CO₂-2] CT Kalka2 [H*]¹² +[H*]K₁+ Kalka2 K₁=10-¹4; K₁₁ =10-6³; K₁₂ = 10-10.3 Note: See pages 63-65 for additional information on the concept of alpha values. 2. What is Cr for the Willamette River Water (more space on the next page)? Kw = α₁C₁ + 2α₂C₁ +₁ −[H*] [H*] = [H*]Kal [H+]² +[H*]K+ Kalka2
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question
Please show each step of calculation
![More Fun with Alkalinity
Water collected from the Willamette River at the Taylor Water Treatment Plant last
October had a pH of 7.4 and an alkalinity of 28.5 mg/L as CaCO3.
1. What is the alkalinity in meq/L?
The alkalinity equation is:
ALK
=[HCO, ]+2[CO, ]+[OH ]–[H* ]
This equation can also be written in terms of [H*], equilibrium constants, and the total
carbonate concentration (Cr) as follows:
where
α₁ =
A₂ =
ALK
[HCO3 ]
CT
[CO₂-2]
CT
=
Kw
= α₁C₁ + 2α₂C₁ +₁ −[H*]
[H*]
[H*]Kal
[H*]² +[H*]Ka+ Kalka2
Kalka2
[H*]¹² +[H*]K₁+ Kalka2
K₁=10-¹4;
K₁₁ =10-6³; K₁₂=10-10.3
Note: See pages 63-65 for additional information on the concept of alpha values.
2. What is Cr for the Willamette River Water (more space on the next page)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc1f14d85-760d-4620-98a3-2fa569cd8edf%2F0ce7c17a-0346-41b5-9c92-be511495f7ad%2Fsb1j0zj_processed.png&w=3840&q=75)
Transcribed Image Text:More Fun with Alkalinity
Water collected from the Willamette River at the Taylor Water Treatment Plant last
October had a pH of 7.4 and an alkalinity of 28.5 mg/L as CaCO3.
1. What is the alkalinity in meq/L?
The alkalinity equation is:
ALK
=[HCO, ]+2[CO, ]+[OH ]–[H* ]
This equation can also be written in terms of [H*], equilibrium constants, and the total
carbonate concentration (Cr) as follows:
where
α₁ =
A₂ =
ALK
[HCO3 ]
CT
[CO₂-2]
CT
=
Kw
= α₁C₁ + 2α₂C₁ +₁ −[H*]
[H*]
[H*]Kal
[H*]² +[H*]Ka+ Kalka2
Kalka2
[H*]¹² +[H*]K₁+ Kalka2
K₁=10-¹4;
K₁₁ =10-6³; K₁₂=10-10.3
Note: See pages 63-65 for additional information on the concept of alpha values.
2. What is Cr for the Willamette River Water (more space on the next page)?
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