Helpenglish9067 Helpenglish9067

02-10-2018
Chemistry

contestada

The ph of a 0.175 m aqueous solution of a weak acid is 3.52. what is ka for this acid?

Respuesta :

ilzinhootigee ilzinhootigee

09-10-2018

Hey there!

pH = - log [ H⁺ ] = 3.52

[ H⁺ ] = 10^-pH

[ H⁺] = 10^ ( -3.52 )

[H⁺] = 3.02*10⁻⁴ M

[HA] =0.175 M

Therefore:

Ka = [ H⁺]* [A⁻] / [ HA]

Ka = (3.02*10⁻⁴)² / 0.175

Ka = 9.1204*10⁻⁸ / 0.175

Ka = 5.2*10⁻⁷

Hope that helps!

Answer Link

Otras preguntas

what was the u.s.s. maddox doing in the gulf of tonkin prior to the august 2 attack? she was on a routine patrol. she was on an intelligence mission to intercep

when me and my friends, arrived to the pool i was scared to jump in because i didn't know how to swim i was scared to go deeper in the water but my friends were

which of the following sentences is parallel? a. everyone not only passed but also is getting an a. b. she not only cooked ham but also made a pie. c. she likes

When a distribution is mound-shaped symmetrical, which of the following best describes the general relationship between the mean, median, and mode? a. No relati

susie likes either playing volleyball or to swim laps. which of the following rewrites makes the sentence parallel? a. susie likes either playing volleyball or

why did the united states support the overthrow of ramón grau san martín's government?a. he was supportive of the soviet union.b. he appointed an entirely commu

why do some readers prefer memoirs?

the price of a notebook was $3.70 yesterday. today, the price fell to $3.45 . find the percentage decrease. round your answer to the nearest tenth of a percent.

Scientists plan to release a space probe that will enter the atmosphere of a gaseous planet. The temperature of the gaseous planet increases linearly with the h

dog chases a cat in a circle around the base of a tree. if the velocity of the dog is 0.35 m/s and the radius of the circle is 0.75 m, what is the centripetal a