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The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.
Correct answer is '3.98'. Can you explain this answer?
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The ion product of water (pKw) is 14. If a rain water sample has a pH ...
pH + pOH = 14
pOH = 14 – 5.6 = 8.4
–log [OH–] = 8.4
[OH–]= 10–8.4 moles/lt
=10–8.4+9 × 10–9 moles/lt
= 3.98 × 10–9 moles/lt
pOH = 14 – 5.6 = 8.4
–log [OH–] = 8.4
[OH–]= 10–8.4 moles/lt
=10–8.4+9 × 10–9 moles/lt
= 3.98 × 10–9 moles/lt
Most Upvoted Answer
The ion product of water (pKw) is 14. If a rain water sample has a pH ...
To find the concentration of OH- in the rain water sample, we can use the equation for pH:
pH = -log[H+]
Since the ion product of water (pKw) is 14, we can find the concentration of H+ using the equation:
Kw = [H+][OH-]
Taking the logarithm of both sides:
log(Kw) = log([H+][OH-])
Since pKw = 14, we can rewrite the equation as:
14 = log([H+]) + log([OH-])
Since the concentration of H+ is equal to the concentration of OH- in pure water, we can rewrite the equation as:
14 = log([H+]) + log([H+])
Simplifying the equation:
14 = 2log([H+])
Dividing both sides by 2:
7 = log([H+])
To find the concentration of H+, we can take the antilog of both sides:
[H+] = 10^7
Since the concentration of OH- in pure water is also equal to 10^-7, we can conclude that in the rain water sample, the concentration of OH- is 10^-7 M.
pH = -log[H+]
Since the ion product of water (pKw) is 14, we can find the concentration of H+ using the equation:
Kw = [H+][OH-]
Taking the logarithm of both sides:
log(Kw) = log([H+][OH-])
Since pKw = 14, we can rewrite the equation as:
14 = log([H+]) + log([OH-])
Since the concentration of H+ is equal to the concentration of OH- in pure water, we can rewrite the equation as:
14 = log([H+]) + log([H+])
Simplifying the equation:
14 = 2log([H+])
Dividing both sides by 2:
7 = log([H+])
To find the concentration of H+, we can take the antilog of both sides:
[H+] = 10^7
Since the concentration of OH- in pure water is also equal to 10^-7, we can conclude that in the rain water sample, the concentration of OH- is 10^-7 M.
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The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer?
Question Description
The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer?.
The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The ion product of water (pKw) is 14. If a rain water sample has a pH of 5.6, the concentration of OH– in the sample (in 10–9 mol/litre, round off to one decimal place), is ________.Correct answer is '3.98'. Can you explain this answer?.
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