I'm a QC expert. I am looking for a flowchart for mixing of HF and KOH to generate KHF2 (Potassium difluoride)in industry, but I don't find anything in internet. Even a system for a strong acid and a strong base is fine with me. Is there anybody to help me? It is so urgent!
Which is the correct way to note the chemical formula? Is it KHF2 or KFHF or is either acceptable? The bifluoride ion is [F-H-F]- so I thought it should be written KFHF to represent the true structure. Deano8216 (talk) 15:04, 2 November 2010 (UTC)
- formulas are funny things and their presentation does not necessary follow obvious logic. Chemist write this compound as KHF2. We never write it as KFHF, but a good chemist would know what you mean and would be impressed that your formula indicates that you know something about the structure. I have always thought that sulfuric should be written (HO)2SO2 instead of H2SO4, but (HO)2SO2 ain't going to happen, as they say.--Smokefoot (talk) 18:03, 2 November 2010 (UTC)
Enthalpy of Formation & Molar Entropy
There is currently a discrepancy between the enthalpy of formation in the literature.
The currently listed H_f (on this wiki page) is -417.26 kJ·K−1*mol−1
The currently listed Entropy (on this wiki page) is 45.56 J/(mol K)
The NIST web book found here:
Has the following values:
Quantity Value Units ΔHf°liquid -916.57 kJ/mol Quantity Value Units S°liquid,1 bar 132.77 J/mol*K
Quantity Value Units ΔHf°solid -931.23 kJ/mol Quantity Value Units S°solid 104.26 J/mol*K
Which of the aforementioned values should be used?