Microsoft Edge https://session.masteringchemistry.com/myct/itemView?as Chapter 1
ID: 552127 • Letter: M
Question
Microsoft Edge https://session.masteringchemistry.com/myct/itemView?as Chapter 17: Homework Exercise 17.84 - modified D=877051 60 Resources * previous| 15 of 25 | next Exercise 17.84 modified Part A For each of the following strong base solutions, determine [OH ,H,o,pH, and pOH 1.10x10 M Ba(OH2 Express your answer using three significant figures. Enter your answers numerically separated by commas. Submit My Answers Give Up Part B Express your answer to three decimal places. Enter your answers numerically separated by commas pH, pOH Submit My Answers Give Up Continue 8:40 PM Type here to search 11/1/2017Explanation / Answer
[OH-] = 2*[Ba(OH)2]
= 2*1.10*10^-2 M
= 2.20*10^-2
A)
we have below equation to be used:
[H3O+] = Kw/[OH-]
Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC
[H3O+] = (1.0*10^-14)/[OH-]
[H3O+] = (1.0*10^-14)/(2.20*10^-2)
[H3O+] = 4.55*10^-13
Answer:
2.20*10^-2 , 4.55*10^-13
B)
we have below equation to be used:
pH = -log [H3O+]
= -log (4.55*10^-13)
= 12.342
we have below equation to be used:
pOH = -log [OH-]
= -log (2.2*10^-2)
= 1.658
Answer:
12.342, 1.658