Chemical Forums
1 Hour
1 Day
1 Week
1 Month
Forever
March 29, 2024, 01:56:51 AM
Forum Rules
: Read This Before Posting
Home
Help
Search
Login
Register
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Coupled equilibria question
« previous
next »
Print
Pages: [
1
]
Go Down
Topic: Coupled equilibria question (Read 896 times)
0 Members and 1 Guest are viewing this topic.
Win,odd Dhamnekar
Full Member
Posts: 165
Mole Snacks: +0/-5
Gender:
Stock Exchange Trader, Investor,Chemistry Hobbyist
Coupled equilibria question
«
on:
January 08, 2021, 12:02:18 PM »
A 0.125-M solution of Mn(NO
3
)
2
is saturated with H
2
S([H
2
S]=0.10 M). At what pH, does MnS begin to precipitate?
MnS(s)
Mn
2+
(aq) + S
2-
(aq) K
sp
= 4.3 × 10
-22
H
2
S (aq) + 2H
2
O (l)
2H
3
O
+
(aq) + S
2-
(aq) K=1.0× 10
-26
I am now studying coupled equilibria chapter to answer this question. Your guidance would be helpful.
Logged
Any science consists of the following process.
1) See 2) Hear 3) Smell if needed 4) Taste if needed
5) Think 6) Understand 7) Inference
take decision [Believe or disbelieve, useful or useless, healthy or unhealthy, cause or effect, favorable or unfavorable, practical or theoretical, practically possible or practically impossible, true or false or any other required criteria]
AWK
Retired Staff
Sr. Member
Posts: 7979
Mole Snacks: +555/-93
Gender:
Re: Coupled equilibria question
«
Reply #1 on:
January 08, 2021, 01:27:45 PM »
https://www.chemicalforums.com/index.php?topic=3719.0
Logged
AWK
Win,odd Dhamnekar
Full Member
Posts: 165
Mole Snacks: +0/-5
Gender:
Stock Exchange Trader, Investor,Chemistry Hobbyist
Re: Coupled equilibria question
«
Reply #2 on:
January 11, 2021, 03:37:58 AM »
I found the answer to this question on the other chemistry educational website on internet, but i don't understand the meaning of highlighted area. What is K
1
K
2
(H
2
S)?
Logged
Any science consists of the following process.
1) See 2) Hear 3) Smell if needed 4) Taste if needed
5) Think 6) Understand 7) Inference
take decision [Believe or disbelieve, useful or useless, healthy or unhealthy, cause or effect, favorable or unfavorable, practical or theoretical, practically possible or practically impossible, true or false or any other required criteria]
mjc123
Chemist
Sr. Member
Posts: 2048
Mole Snacks: +296/-12
Re: Coupled equilibria question
«
Reply #3 on:
January 11, 2021, 05:38:54 AM »
K
1
and K
2
are the two ionisation constants of H
2
S:
H
2
S + H
2
O
H
3
O
+
+ HS
-
K = K
1
HS
-
+ H
2
O
H
3
O
+
+ S
2-
K = K
2
Logged
Win,odd Dhamnekar
Full Member
Posts: 165
Mole Snacks: +0/-5
Gender:
Stock Exchange Trader, Investor,Chemistry Hobbyist
Re: Coupled equilibria question
«
Reply #4 on:
January 11, 2021, 09:44:09 AM »
Thanks.
Logged
Any science consists of the following process.
1) See 2) Hear 3) Smell if needed 4) Taste if needed
5) Think 6) Understand 7) Inference
take decision [Believe or disbelieve, useful or useless, healthy or unhealthy, cause or effect, favorable or unfavorable, practical or theoretical, practically possible or practically impossible, true or false or any other required criteria]
Print
Pages: [
1
]
Go Up
« previous
next »
Sponsored Links
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Coupled equilibria question