Is the Molar Concentration of K+ in K2S2O4 Double That of S2O4^2-?

Thread starter Andrax
Start date Oct 26, 2013

AI Thread Summary

The discussion centers around the molar concentration of a solution containing the ions (2k+ and (S2O4)2-), specifically questioning whether the concentration of 2k+ is equal to 1 mol/L or 2 mol/L. It is established that the concentration of (S2O4)2- is 1 mol/L, leading to confusion about the concentration of 2k+. The key point clarified is that since there are two potassium ions (k+) for each formula unit of (S2O4)2-, the concentration of 2k+ is indeed 2 mol/L, not 1 mol/L. This highlights the importance of understanding stoichiometry in solutions.

Oct 26, 2013

Andrax

suppose that the molar concentration of (2k+ , (S2O4)2-) is C=1mol/l

we have C((S2O4)2-)=C=1mol.l but does C(2k+)=1 mol/l ? or 2C=2mol/l(since there are 2 k+ )

this question might be silly , but this really confused me and i can't come up with the correct answer

Chemistry news on Phys.org

Oct 26, 2013

Borek

Mentor

2 mol/L.

Thread 'Nobel Prize in Chemistry 2025'

https://www.nobelprize.org/prizes/chemistry/2025/popular-information/

View full post »

Thread 'How to make Sodium Chlorate by Electrolysis of salt water?'

I have a power supply for electrolysis of salt water brine, variable 3v to 6v up to 30 amps. Cathode is stainless steel, anode is carbon rods. Carbon rod surface area 42" sq. the Stainless steel cathode should be 21" sq. Salt is pure 100% salt dissolved into distilled water. I have been making saturated salt wrong. Today I learn saturated salt is, dissolve pure salt into 150°f water cool to 100°f pour into the 2 gallon brine tank. I find conflicting information about brine tank...

View full post »

Thread 'Ruthenium-Iridium compound with catalytic effects'

Engineers slash iridium use in electrolyzer catalyst by 80%, boosting path to affordable green hydrogen https://news.rice.edu/news/2025/engineers-slash-iridium-use-electrolyzer-catalyst-80-boosting-path-affordable-green Ruthenium is also fairly expensive (a year ago it was about $490/ troy oz, but has nearly doubled in price over the past year, now about $910/ troy oz). I tracks prices of Pt, Pd, Ru, Ir and Ru. Of the 5 metals, rhodium (Rh) is the most expensive. A year ago, Rh and Ir...

View full post »