Answer:
X liters of 10% + (30 - x) liters of 22% = 30...
Answer: C REDUCTION
Explanation:
Guessed after knowing oxidation isn't the answer. Got right
Solution :
The equation is :

The number of the moles of HA os 0.00285, and the volume is 25 mL.
15 mL of the 0.0950 M NaOH is added.
The total volume of a solution is V = 25 mL + 15 mL = 40 mL
The pH of the solution is 6.50
Calculating the
of HA

![K_a=\frac{[A^-].[H^+]}{[HA]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BA%5E-%5D.%5BH%5E%2B%5D%7D%7B%5BHA%5D%7D)
Let s calculate the concentration of HA and NaOH
![$[HA] = \frac{^nH_A}{V}$](https://tex.z-dn.net/?f=%24%5BHA%5D%20%3D%20%5Cfrac%7B%5EnH_A%7D%7BV%7D%24)

= 0.07125 M
![$[NaOH]= \frac{0.015L \times 0.0950 M}{V}$](https://tex.z-dn.net/?f=%24%5BNaOH%5D%3D%20%5Cfrac%7B0.015L%20%5Ctimes%200.0950%20M%7D%7BV%7D%24)

= 0.0356 M

Initial conc. (M) 0.07125 M 0.0356 M 0 M
Change in conc. (M) -0.0356 M -0.0356 M + 0.0356 M
Equilibrium conc. (M) 0.03565 M 0 M 0.0356 M
Therefore, the concentration of HA and the NaA at the equilibrium are [HA] = 0.03565 M and [NaA]= 0.0356 M
0.0356 M of NaA dissociates completely into 0.0356 M
and 0.0356 M 
Now for
![$[H^+] = 10^{-pH}$](https://tex.z-dn.net/?f=%24%5BH%5E%2B%5D%20%3D%2010%5E%7B-pH%7D%24)


Calculating the value of
,
![K_a=\frac{[A^-].[H^+]}{[HA]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BA%5E-%5D.%5BH%5E%2B%5D%7D%7B%5BHA%5D%7D)


Therefore the the value of
for the unknown acid is
.
Jkjhhfibu bugging kidding
Answer:
There is a direct relationship between pH and concentration. I.e
pH= -log[H+]
Explanation:
As the concentration of a solution changes, the H+ concentration changes hence from the relationship pH= -log[H+] the pH also changes