User Account

All Pages

Calculate the acidity constant of hypochlorous acid

Assignment Help Chemistry
Reference no: EM13838429

Disinfection by chlorine (HOCl/OCl-) is widely used to reduce pathogens in drinking water.  The ratio of HOCl/OCl- in water is pH-dependent. 

Because HOCl is a much stronger disinfectant than OCl-, a typical goal is to achieve [HOCl] = 2 mg/L as Cl2 (i.e., 2.82´10-5 M of HOCl) in order to maintain sufficient disinfection efficiency.

Calculate the acidity constant of hypochlorous acid (HOCl) at 25°C, I = 0.0 M.

     HOCl = H+  +  OCl-        Ka = {H+}{OCl-}/{HOCl}  

Is HOCl acid dissociation endothermic or exothermic?

Suppose the source water is at 25°C, I = 0.0 M, and pH = -log{H+} = 7.8, how much total chlorine needs to be added to the water in order to achieve [HOCl] = 2 mg/L as Cl2?

Reference no: EM13838429

Questions Cloud

Fundamental set of solution : Verify that y1(t) =(1/(t^3)) and y2(t) = (ln(t))/(t^3) are solutions to (t^2)y''+7ty'+9y = 0, t>0. Do y1, y2 for a fundamental set of solutions? Give a reason for your answer and show all steps.
What activities or exercises were beneficial to you : As this course draws to a close, Grantham University and I want to thank you for your hard work and commitment throughout the past eight weeks. In this final discussion forum, I'd like to open the floor to you and ask for your feedback. What activ..
Describe two improvements that the people of ikror have : describe two improvements that the people of ikror have enjoyed
Verify a fundamental set of solutions : Verify that y1(t) = 1/t^3 and y2(t) = ln(t)/t^3 are solutions to t^2y''+7ty'+9y = 0, t > 0. Do y1, Y2 form a fundamental set of solutions? Give a reason for your answer.
Calculate the acidity constant of hypochlorous acid : Calculate the acidity constant of hypochlorous acid - Is HOCl acid dissociation endothermic or exothermic - how much total chlorine needs to be added to the water in order to achieve [HOCl] = 2 mg/L as Cl2?
What did you learn from the devil advocate : What did you learn from the devil's advocate? How can you use their own propaganda against them - so that your argument is even stronger
Create an event report focusing on policy analysis : Create an event report focusing on policy analysis and key managerial and strategic issues. You will need to assess the influence of Special Events policy makers and implementers in relation to your event and identify how you will address each.
Indicate whether the following statement is true or false : Indicate whether the following statement is True or False
What is the velocity of a sandbag : What is the velocity (in ft/s) of a sandbag 2.75 s after it is released from a hot-air balloon that is stationary in the air.

Reviews

Write a Review

Chemistry Questions & Answers

  Calculate the cell voltage using the half-reaction

Problem- The concentrations of NaCl and KI are at 0.150M and 0.100M respectively, in the following electrochemical cell

  Compute the average density of a neon atom

Use the atomic radius (70 pm) and density of neon at 25 °C and 1 atm (0.90 g/mL) to calculate the average density of a neon atom.

  Ammonia will react with oxygen in the presence of a copper

ammonia will react with oxygen in the presence of a copper catalyst to form nitrogen and water. from 164.5degc to

  Sodium nitrate was added to 20 l of water at 25 degc to

1.indicate the solubility of the following solutes in 100 g of watera.potassium chlorate at 90 degcb.potassium nitrate

  Explain sample of air contaminated with sulfur dioxide

An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500m mL sample of air at 700 torr and 38 degrees celsius, she adds 20.00 mL of 0.01017 M aqueous iodine, which reacts as follows

  Compute the number of moles of sodium hydroxide

Calculate the number of moles of sodium hydroxide used in the titration. b. How many equivalents of unknown acid were titrated? c. Determine the equivalent mass of the unknown acid

  A solution is prepared by dissolving unknown nonelectrolyte

A solution is prepared by dissolving 3.65 g of an unknown nonelectrolyte in 15.00 g of cylcohexane (tf = 6.6 oC and kf = 20.0 oC/m).

  How to calculate the solubility of copper (ii) iodate

Calculate the solubility of copper (II) iodate in 0.56 M copper (II) nitrate. Ksp* is 7.4x10-8 M3.

  Calculate the change in entropy

calculate the change in entropy when 25KJ of energy is transferred reversibly and isothermally as heat to a large block of iron at (a) 0C and (b) 100c.

  What was the initial temperature

Question- An ideal gas in a sealed container has an initial volume of 2.40 L. At constant pressure, it is cooled to 21.00 °C where its final volume is 1.75 L. What was the initial temperature

  Define processes as spontaneous or nonspontaneous

Classify each of the following processes as spontaneous or nonspontaneous. I. H2O(l) --> H2O(g) T=25 deg C, vessel open to atmosphere with 50% relative humidity.

  Define 2-hexyne from 1,1-dichlorobutane

Show by writing appropriate chemical equation how each of the following conversions could be achieved: 2-hexyne from 1,1-dichlorobutane.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd