OCR F325 Buffers Question
I've been trying to solve the second part of this question for ages now and I'm not getting any closer to the answer, would anyone be able to help me please? my teacher said it's an A* question but I'd still like to be able to understand it. I've attached the question and my current workings below. Thanks in advance
The question is:
Show that the pH of this buffer becomes 5.28 if 10cm^3 of 0.1M HCl are Added
Apologies for the shocking handwriting also!
The question is:
Show that the pH of this buffer becomes 5.28 if 10cm^3 of 0.1M HCl are Added
Apologies for the shocking handwriting also!
-Calculate the moles of the buffer solution acid.
-Calculate the moles of the HCl.
-Add them up.
-Calculate the moles of the salt.
-Subtract moles of HCl from moles of salt.
- Substitute new values into the Henderson-Hasselbalch equation.
pH = -log(1.84*10^-5) + log(0.039/0.011) = 5.28
(The inc. in volume is ignored)
Posted from TSR Mobile
-Calculate the moles of the HCl.
-Add them up.
-Calculate the moles of the salt.
-Subtract moles of HCl from moles of salt.
- Substitute new values into the Henderson-Hasselbalch equation.
pH = -log(1.84*10^-5) + log(0.039/0.011) = 5.28
(The inc. in volume is ignored)
Posted from TSR Mobile
Original post by Basmaa
-Calculate the moles of the buffer solution acid.
-Calculate the moles of the HCl.
-Add them up.
-Calculate the moles of the salt.
-Subtract moles of HCl from moles of salt.
- Substitute new values into the Henderson-Hasselbalch equation.
pH = -log(1.84*10^-5) + log(0.039/0.011) = 5.28
(The inc. in volume is ignored)
Posted from TSR Mobile
-Calculate the moles of the HCl.
-Add them up.
-Calculate the moles of the salt.
-Subtract moles of HCl from moles of salt.
- Substitute new values into the Henderson-Hasselbalch equation.
pH = -log(1.84*10^-5) + log(0.039/0.011) = 5.28
(The inc. in volume is ignored)
Posted from TSR Mobile
Thanks!
(edited 10 years ago)
Quick Reply
Related discussions
- A level chemistry help URGENT ‼️
- Can someone please help me with this question about buffers?
- ocr chemistry acid question
- alevel Chem Topics with most marks
- OCR A-Level Chemistry B Paper 1 (H433/01) - 12th June 2023 [Exam Chat]
- chemistry help for a level ocr
- Chemistry a level ocr
- A level chemistry OCR
- A-level Chemistry Study Group 2022-2023
- OCR A Level Chemistry Paper 1 H432/01 - 13th Jun 2022 [Exam Chat]
- Urgent OCR Chemistry Help
- Chem a level buffers question
- Question about negative control pcr test!!!
- OCR chemistry weak acid and base question
- Problem with buffers in A2 Chemistry
- Buffer calculation help
- biology as 2022 paper 1 ocr
- Chemistry a level buffers questions
- Buffer calculation question A level chemistry help
- chemistry pH question HELP
Latest
Trending
Last reply 1 week ago
Im confused about this chemistry question, why does it form these productsTrending
Last reply 1 week ago
Im confused about this chemistry question, why does it form these products
