What is the ph of a 1.2 m ch3nh3no3 solution


Asked by wiki @ in Chemistry viewed by 602 People


What is the ph of a 0.17 m solution of methylammonium nitrate (ch3nh3no3)? kb for methylamine (ch3nh2) is 5.0 × 10−4 . 1. 7.00 2. 5.86 3. 5.73 4. 2.04 5. 12.0 6. 5.58 7. 6.35 8. 5.49?

Answered by wiki @



When we have Kb = 5 x 10^-4 & Kw= 1 x10^-14

∴ Ka = Kw / Kb 

by substitution:

∴ Ka = (1 x 10^-14) /(5 x 10^-4)

        = 2 x 10^-11

by using ICE table: 

             CH3NH3+  + H2O ↔ H3O+  + CH3NH2

initial     0.17                               0             0

change  -X                                 +X            +X

Equ       (0.17 -X)                           X             X

∴Ka = [H3O+][CH3NH2]/[CH3NH3+]

by substitution:

2 x 10^-11 = X^2 / (0.17 -X)
we can assume that [CH3NH3+] = 0.17
2 x 10^-11 = X^2 / 0.17    by solving for X 

∴X = 1.8 x 10^-6

∴[H3O+] = X = 1.8 x 10^-6 

∴ PH = - ㏒(1.8 x 10^-6)

         = 5.7

Do you know the better answer?

Similar Questions

List the following ions in order of increasing ionic radius

Asked by wiki @ in Chemistry viewed by 306 persons

Arrange the ions N3-, O2-, Mg2 , Na , and F- in order of increasing ionic radius, starting with the smallest first. Arrange the ions N3-, O2-, Mg2 , Na …

The idea of copyright dates back to when and where

Asked by wiki @ in Arts viewed by 181 persons

The idea of copyright dates back to when and where? 800s and China 1100s and Germany 1500s and Great Britain 1800s and South Egypt

How many queens are in a standard deck of cards

Asked by wiki @ in Mathematics viewed by 219 persons

1. If we remove all of the queens from a 52-card deck, how many unique four card combinations can we have? (A normal deck of cards has 52 cards, 4 …

What are two common effects of driving on open highways

Asked by wiki @ in Physics viewed by 232 persons

3. What are two common effects of driving on open highways? A. Speeding and highway hypnosis B. Fatigue and visual effects C. Velocitation and fatigue D. Velocitation and highway hypnosis

What was william paterson's main contribution to the constitutional convention

Asked by wiki @ in Social Studies viewed by 259 persons

What was William Paterson’s main contribution to the Constitutional Convention?

Who wrote the first draft of the articles of confederation

Asked by wiki @ in History viewed by 186 persons

What was the main concern with John Dickerson first draft Articles of Confederation ​

When two monosaccharides undergo a dehydration synthesis

Asked by wiki @ in Chemistry viewed by 107 persons

When two monosaccharides undergo a dehydration synthesis reaction in which type of molecule is formed?

Eureka math grade 5 module 2 lesson 15 problem set

Asked by wiki @ in Mathematics viewed by 272 persons

Fifth grade eureka math Problems set module 2 lesson 1

Who has the comparative advantage in the production of corn

Asked by wiki @ in Business viewed by 244 persons

Suppose Hank and Tony can both produce corn. If Hank's opportunity cost of producing a bushel of corn is 2 bushels of soybeans and Tony's opportunity cost of producing a …

Which statement best describes how muscles respond to weight training

Asked by wiki @ in Health viewed by 381 persons

Which statement BEST describes how muscles respond to weight training? A. Weight training stretches the muscles' limits and makes the muscles longer. B. Weight training pushes the muscles' abilities, making …

Earthenware and stoneware produced in ancient china were decorated with

Asked by wiki @ in Arts viewed by 239 persons

Earthenware and stoneware produced in ancient china were decorated with

In what ways can culture be reflected in academic texts

Asked by wiki @ in English viewed by 353 persons

What cultural experiences are reflected in the excerpt from “Living or Dead?” How does the culture and the history of the time period affect the passage? Use evidence from the …

What is the correlation coefficient for the set of data

Asked by wiki @ in Mathematics viewed by 256 persons

What is the correlation coefficient for the set of data? Round Your answer to the nearest thousandth. a. 0.014b. 0.989c. 0.075d. -0.977

2x 3y 12 solve for y in terms of x

Asked by wiki @ in Mathematics viewed by 206 persons

2x + 3y = 12 solve for y

How many words can you make out of deoxyribonucleic acid

Asked by wiki @ in Chemistry viewed by 349 persons

What words can you make up of DEOXYRIBONUCLEIC ACID ?

Write 5 sentences in spanish using the present subjunctive tense

Asked by wiki @ in Spanish viewed by 385 persons

Write 5 sentences in Spanish using the present subjunctive tense. You will be graded on (a) correct conjugation of the subjunctive, (b) correct subjunctive idea, and (c) overall quality and …

What does the imagery in the passage show about doodle

Asked by wiki @ in English viewed by 267 persons

What does the imagery in the passage show about Doodle? A) He has many talents, including singing and gardening. B) He thinks that the scene is funny and tries not …

Nixon initially wanted to help boost the us economy by

Asked by wiki @ in History viewed by 261 persons

Nixon initially wanted to help boost the US economy by

Which polynomial is factored completely

Asked by wiki @ in Mathematics viewed by 187 persons

Which polynomial is factored completely a. 4 (4x^4-1) b. 2x (y^3-4y^2+5y) c. 3x (9×^2+1) d. 5x^2-17x+14?

List elements of western culture the romans helped to shape

Asked by wiki @ in History viewed by 275 persons

Provide at least three elements of western culture the romans helped to shape? explain each as required.

What are the six bones found in all tetrapod legs

Asked by wiki @ in Biology viewed by 180 persons

What are the six bones found in all tetrapod legs?

The paramecium is a single celled organism that reproduces asexually

Asked by wiki @ in Biology viewed by 227 persons

The paramecium is a single-celled organism that reproduces asexually. The offspring of a paramecium usually contain (1)only half of the genes of the parent cells (2)more DNA than the parent …

What percentage of roads in germany have no speed limit

Asked by wiki @ in Social Studies viewed by 161 persons

What percentage of roads in germany have no speed limit?

Which blood vessels contain valves to prevent backflow of blood

Asked by wiki @ in Biology viewed by 199 persons

Vessels that contain valves to prevent backflow of blood is called

What is the iroquois league and why was it formed

Asked by wiki @ in Social Studies viewed by 128 persons

What was the Iroquois League,and why was it formed?

Which element does not contain any neutrons

Asked by wiki @ in Physics viewed by 181 persons

Which element does not contain any neutrons ?

Does x or y go on top of a fraction

Asked by wiki @ in Mathematics viewed by 372 persons

When writing fraction from a graph does the x axis number go on top or bottom​

What does the dynamic marking p mean in measure 1

Asked by wiki @ in Arts viewed by 216 persons

What does the dynamic marking mf mean in measure 1?

Which of the following is an example of latent learning

Asked by wiki @ in Social Studies viewed by 189 persons

Which of the following is an example of latent learning?a) a rabbit knowing to run away from an unleashed dogb) learning tokens for good behavior and spending the tokens on …

Under the endangered species act who looks after marine wildlife

Asked by wiki @ in Biology viewed by 174 persons

Under the Endangered Species Act, who looks after marine wildlife? A. Fish and Wildlife Service B. International Union for Conservation of Nature C. Department of Natural Resources D. National Marine …

Most viewed questions in Chemistry


What is the difference between a white and red reaction

Asked by wiki @ in Chemistry viewed by 1584 persons


Convert 8.00 x 10 20 molecules of h2 to moles

Asked by wiki @ in Chemistry viewed by 1515 persons


A vitamin c tablet containing 250 mg of ascorbic acid

Asked by wiki @ in Chemistry viewed by 929 persons



Calculate the molality of a 20 by mass ammonium sulfate

Asked by wiki @ in Chemistry viewed by 827 persons


How many carbon atoms are in 2.12 mol of propane

Asked by wiki @ in Chemistry viewed by 805 persons


Determine the minimum mass of hydrogen gas required to produce

Asked by wiki @ in Chemistry viewed by 759 persons



An oxidation reduction reaction that is also a synthesis reaction

Asked by wiki @ in Chemistry viewed by 714 persons


Which of the following is true about subatomic particles

Asked by wiki @ in Chemistry viewed by 708 persons


Which of the following statements regarding electrical safety is correct

Asked by wiki @ in Chemistry viewed by 670 persons



The mass of 1.21 x10 20 atoms of sulfur is

Asked by wiki @ in Chemistry viewed by 636 persons


Calculate the mass of 3.05 buckets of golf balls answer

Asked by wiki @ in Chemistry viewed by 633 persons


What is the ph of a 1.2 m ch3nh3no3 solution

Asked by wiki @ in Chemistry viewed by 601 persons



A solution that contains 70g of nano3 at 30 c

Asked by wiki @ in Chemistry viewed by 593 persons


What is the electron pair geometry for c in cs2

Asked by wiki @ in Chemistry viewed by 588 persons


What is the uncertainty of a 50 ml graduated cylinder

Asked by wiki @ in Chemistry viewed by 585 persons