Answer:
The value of the dissociation constant will be:
.
Explanation:
At ,t= 0 c 0 0
At eq'm (c-x) x x
Concentration of aspirin = c
Expression for dissociation constant will be given as:
![K_a=\frac{[H^+][As^+]}{[AsH]}=\frac{x\times c}{(c-x)}=\frac{x^2}{(c-x)}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BH%5E%2B%5D%5BAs%5E%2B%5D%7D%7B%5BAsH%5D%7D%3D%5Cfrac%7Bx%5Ctimes%20c%7D%7B%28c-x%29%7D%3D%5Cfrac%7Bx%5E2%7D%7B%28c-x%29%7D)
..(1)
The pH of the solution = 2.60
The pH of the solution is due to free hydrogen ions whcih come into solution after partial dissociation of aspirin.
![pH=2.60=\log[H^+]=-\log[x]](https://tex.z-dn.net/?f=pH%3D2.60%3D%5Clog%5BH%5E%2B%5D%3D-%5Clog%5Bx%5D)
Putting value of x in (1).
The value of the dissociation constant will be:.
Answer:
option b= 1.26 mol/L
Explanation:
Given data:
moles = 2.34 mol
volume = 1860 mL
Solution:
molarity = moles of solute/ volume in L
First of all we will convert the mL in L,
1860 mL / 1000 = 1.86 L
now we will put the values in formula,
molarity = 2.34 mol / 1.86 L
molarity = 1.26 mol/L
Liquid, white,hm,wax,grey,sweet, white,minty,fresh,
The new volume of the gas is 100mL
Boyle's law is use to calculate the volume of a gas in relation with its pressure. The Boyle's law equation is as follows:
P1V1 = P2V2
Where;
P1 = initial pressure of the gas (torr)
P2 = final pressure of the gas (torr)
V1 = initial volume of the gas (mL)
V2 = final volume of the gas (mL)
According to the information of this question, the pressure on 200mL of a gas changed from 380 torr to 760 torr. Hence;
V1 = 200mL
V2 = ?
P1 = 380torr
P2 = 760torr
Using P1V1 = P2V2
V2 = P1V1/P2
V2 = (380 × 200) ÷ 760
V2 = 76000 ÷ 760
V2 = 100mL
Hence, the new volume of the gas is 100mL
Learn more: brainly.com/question/22467228
