angelyce4305 angelyce4305

07-03-2018
Chemistry

contestada

A certain weak acid, HA, has a Ka value of 1.8×10−7.
Part A
Calculate the percent dissociation of HA in a 0.10 M solution.

Respuesta :

nordico nordico

19-03-2018

Formula for Equilibrium: HA <---> H+ + A-

To find Ka = [H+][A-]/[HA]
[HA] = 0.10,
[H+] = [A-] = x

Solve for Ka

Ka = 1.8X10^-7 = x^2 / 0.10
x = 1.3X10^-4 M = [A-]

% Dissociation =
([A-]/[HA]) X 100 = (1.3X10^-4 / 0.10) X 100 = 0.13% ionized

Answer is 0.13%.

Answer Link

Otras preguntas

I need yo solve y on this problem.4x - 5 = 7 + 4y

Light travels at the speed of approximately 3.0 × 108 meters per second. Find the time in minutes required for light to travel from the sun to Earth (an approxi

If JK=20-x^2, KL=2-x, and JL=10 find x

Suppose five pumpkins are weighed two at a time in all possible ways. The weights in pounds are recorded as 16,18,19,20,21,22,23,24,26, and 27. How much does ea

Timothy has attached earlobes like his maternal grandfather. His mother and father both have free earlobes, which are dominant. Which statement best explains h

I need yo solve y on this problem.4x - 5 = 7 + 4y

A family has annual loan payments equal to 30% of their annual income. During the year, their loan payments total $15,680. What is the family's annual income? (

Factor expression in x and y. x² −25−2xy +y²

Jenny ran the 100-yard dash in 25 seconds. Kyle ran the 200-yard dash in 40 seconds. How many feet did Jenny run each second? How many feet did Kyle run each se

AB and BC share point B to form AC. If AC=7 and BC=5, then what is the length of AB?