What is the ph of a 1.2 m ch3nh3no3 solution

Asked by wiki @ in Chemistry viewed by 714 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

Similar Questions

What is the ph of a 0.20 m hcl solution

Asked by wiki @ in Chemistry viewed by 182 persons

Calculate the pH of a 0.20 M NH3/0.20 M NH4Cl buffer after the addition of 25.0 mL of 0.10 M HCl to 65.0 mL of the buffer.

Find the ph of a 0.0075 m sulfuric acid solution.

Asked by wiki @ in Chemistry viewed by 166 persons

What is the ph of a 0.0075 m concentration of hydrochloric acid hcl? 0.50 1.1 2.1 3.2?

What is the ph of a 1x10-4 m hcl solution

Asked by wiki @ in Chemistry viewed by 172 persons

Determine the pH of a 1x10^-4 M solution of HCl.

What is the ph of a 0.020 m hclo4 solution

Asked by wiki @ in Chemistry viewed by 150 persons

For the strong acid solution 0.0058 m hclo4, determine [h3o+] and [oh−].

What is the ph of a 0.050 m lioh solution

Asked by wiki @ in Chemistry viewed by 241 persons

50.0 mL of an HNo3 solution were titrated with 36.90 mL of a 0.100 M LiOH solution to reach the equivalence point. What is the molarity of the HNO3 solution.

What is the ph of a 0.001 m hno3 solution

Asked by wiki @ in Chemistry viewed by 370 persons

What is the pH of a 0.001M HNO3 solution

Calculate the ph of a solution of 0.0025 m h2so4

Asked by wiki @ in Chemistry viewed by 247 persons

Calculate the pH of a solution of 0.0025M H2SO4Please help I dont get how to do these​

What is the ph of a 0.6 m hno3 solution

Asked by wiki @ in Chemistry viewed by 328 persons

Calculate: concentration is measured by molarity (m), or moles per liter. brackets are also used to symbolize molarity. for example, if 0.6 moles of hno3 are dissolved in a liter …

What is the ph of a 0.027 m koh solution

Asked by wiki @ in Chemistry viewed by 252 persons

What is the ph of a 0.027 M KOH solution?

What is the ph of a 0.056 m hno3 solution

Asked by wiki @ in Chemistry viewed by 263 persons

What is the pH of a 0.056 m hno3 solution

What is the ph of a 0.00125 m hcl solution

Asked by wiki @ in Biology viewed by 493 persons

What is the pH of a 0.00125 M HCl solution?

What is the ph of a 0.0125 m naoh solution

Asked by wiki @ in Chemistry viewed by 451 persons

100. ml of 0.200M HCl is titrated with 0.250M NaOH. 1. What is the pH of the solution after 50.0ml of base has been added? 2.What is the pH of …

What is the ph of a 0.001 m naoh solution

Asked by wiki @ in Chemistry viewed by 379 persons

What is the ph of a 0.001 62 m naoh solution?

Calculate the ph and poh of 0.05 m hcl solution

Asked by wiki @ in Chemistry viewed by 332 persons

Which of these substances has the lowest pH? 0.5 M HBr, pOH = 13.5 0.05 M HCl, pOH = 12.7 0.005 M KOH, pOH = 2.3

What is the ph of a 0.00125 m naoh solution

Asked by wiki @ in Biology viewed by 307 persons

What is the pH of the 0.00125 M NaOH solution ​

Most viewed questions in Chemistry

What is the difference between a white and red reaction

Asked by wiki @ in Chemistry viewed by 1887 persons

Convert 8.00 x 10 20 molecules of h2 to moles

Asked by wiki @ in Chemistry viewed by 1703 persons

A vitamin c tablet containing 250 mg of ascorbic acid

Asked by wiki @ in Chemistry viewed by 1170 persons

Calculate the molality of a 20 by mass ammonium sulfate

Asked by wiki @ in Chemistry viewed by 958 persons

How many carbon atoms are in 2.12 mol of propane

Asked by wiki @ in Chemistry viewed by 915 persons

Determine the minimum mass of hydrogen gas required to produce

Asked by wiki @ in Chemistry viewed by 894 persons

An oxidation reduction reaction that is also a synthesis reaction

Asked by wiki @ in Chemistry viewed by 815 persons

Which of the following is true about subatomic particles

Asked by wiki @ in Chemistry viewed by 804 persons

Which of the following statements regarding electrical safety is correct

Asked by wiki @ in Chemistry viewed by 758 persons

The mass of 1.21 x10 20 atoms of sulfur is

Asked by wiki @ in Chemistry viewed by 730 persons

Calculate the mass of 3.05 buckets of golf balls answer

Asked by wiki @ in Chemistry viewed by 717 persons

What is the ph of a 1.2 m ch3nh3no3 solution

Asked by wiki @ in Chemistry viewed by 714 persons

A solution that contains 70g of nano3 at 30 c

Asked by wiki @ in Chemistry viewed by 668 persons

What is the electron pair geometry for c in cs2

Asked by wiki @ in Chemistry viewed by 660 persons

What is the uncertainty of a 50 ml graduated cylinder

Asked by wiki @ in Chemistry viewed by 659 persons