Answered

Get the answers you need at Westonci.ca, where our expert community is dedicated to providing you with accurate information. Discover detailed solutions to your questions from a wide network of experts on our comprehensive Q&A platform. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform.

Calculate the pH of the following solutions at 298 K.
a) 0.25 mol dm-3 HCl.​​​​​​​​
b) 0.15 mol dm-3 H2SO4.​​​
c) 0.15 mol dm-3 benzoic acid. Ka(benzoic acid) = 6.4 x 10-5 mol dm-3.
d) 0.10 mol dm-3 KOH. Kw(298 K) = 1.0 x 10-14 mol2 dm-6.

Calculate The PH Of The Following Solutions At 298 K A 025 Mol Dm3 HCl B 015 Mol Dm3 H2SO4 C 015 Mol Dm3 Benzoic Acid Kabenzoic Acid 64 X 105 Mol Dm3 D 010 Mol class=

Sagot :

pstnonsonjoku

The term pH has to do with the hydrogen ion concentration of a solution.

What is pH?

The term pH has to do with the hydrogen ion concentration of a solution. Let us now proceed the pH of the solutions;

a) pH of HCl = -log(0.25) = 0.62

b) pH of H2SO4 = -log(0.15) = 0.82

c)  We have to set up an ICE table here;

              C6H5COOH + H2O ⇄ C6H5COO- + H^+

I            0.15                                  0                      0

C          -x                                       +x                     +x

E         0.15 -x                                  x                      x

Ka = [C6H5COO-] [ H^+]/[C6H5COOH]

6.4 x 10^-5 = x^2/0.15 - x  

6.4 x 10^-5(0.15 - x) = x^2

9.6 * 10^-6 - 6.4 x 10^-5x = x^2

x^2 + 6.4 x 10^-5x - 9.6 * 10^-6 = 0

x=0.003 M

Hence;

[C6H5COO-] = [ H^+] = x = 0.003 M

pH = - log[0.003 M] = 2.5

d) [OH-] [H^+] = 1.0 x 10-14 mol2 dm-6

[H^+] = 1.0 x 10-14 mol2 dm-6/ 0.10 mol dm-3

[H^+] = 1 * 10^-13 M

pH= - log[1 * 10^-13 M] = 13

Learn more about pH of a solution:https://brainly.com/question/15289741

#SPJ1

We appreciate your time. Please come back anytime for the latest information and answers to your questions. Thank you for visiting. Our goal is to provide the most accurate answers for all your informational needs. Come back soon. Thank you for visiting Westonci.ca. Stay informed by coming back for more detailed answers.