What is the Molecular Weight of Potassium Phosphate Buffer at pH 6.8 and 6.4?

AI Thread Summary
The discussion focuses on the molecular weight of potassium phosphate buffers at pH 6.8 and pH 6.4. The molecular weight of potassium phosphate (K3PO4) is confirmed to be 212.28 g/mol. It is clarified that the molecular weight does not change with pH, as pH variations do not affect the molar mass of the compound. Instead, the molar concentration of a buffer refers to the total concentration of both the acid and its conjugate base in the mixture. The conversation also highlights the importance of accurately identifying chemical formulas when discussing molecular weights.
MusicMonkey
Messages
48
Reaction score
0
What is the molecular weight of potassium phosphate buffer pH 6.8 and pH 6.4? I tried to find the answer but no luck. Please help calculate. Thank you. :bugeye:
 
Chemistry news on Phys.org
K+ PO3(4-) MW: 212.28 ... am I missing something here? how does mw change as pH changes?
 
It does not...and while you have the corrrect MW it looks like you may have mistyped the formula for K_3PO_4
 
Buffers are mixtures so there is no such thing as molar mass. Molar concentration of buffer refers to the total concentration of both acid and conjugated base.


Chemical calculators for labs and education
BATE - pH calculations, titration curves, hydrolisis
 
Gokul43201 said:
It does not...and while you have the corrrect MW it looks like you may have mistyped the formula for K_3PO_4
yes, I realized that.
 

Similar threads

Buffer solution working with DNA -- I have to dissolve dried oligos in PBS
Replies
1
Views
2K
Potassium Phosphate Buffer
Replies
11
Views
23K
Calculate the pH Slope using 7.0 and 10.0 buffers
Replies
10
Views
10K
Molecular weight of lead(ii) nitrate Pb(NO_3)_2
Replies
4
Views
4K
How to create a buffered pH gradient?
Replies
9
Views
9K
How can I prepare a 0.1M NaOAc buffer at pH 5 using titration?
Replies
4
Views
5K
Ionic strength of Mcilvaine's Buffer
Replies
3
Views
3K
Residential concrete densifier and sealer?
Replies
8
Views
2K
Solving the HH equation for a Phosphate Buffer
Replies
4
Views
4K
How to make 0.2 M Tris-Acetate Buffer pH 6
Replies
5
Views
9K

Hot Threads

Recent Insights

Back
Top