How Do You Calculate the Activity Coefficient of H+ from pH?

AI Thread Summary
To calculate the activity coefficient of H+ from a measured pH of 1.092 for 0.100 M HCl at 25°C, the Debye-Huckel equation was initially used, yielding a value of 0.825, which was deemed incorrect. The discussion emphasizes that the calculation should focus on the experimental value rather than theoretical predictions. Participants clarify the relationship between pH and concentration, which is crucial for accurate calculations. Understanding the dependence of pH on concentration is essential for determining the correct activity coefficient. Accurate calculations require careful consideration of experimental conditions and the specific equations applicable to the scenario.
emc92
Messages
33
Reaction score
0
The measured pH of 0.100 M HCl at 25°C is 1.092. From this information, calculate the activity coefficient of H+.


I tried using the Debye-Huckel equation and got 0.825 but it's not right. I don't know how else to solve for the activity coefficient.
 
Physics news on Phys.org
You are not asked to calculate theoretical value, but to calculate experimental value.

What is pH that you have just measured? How does it depend on the concentration?
 
i figured this one out. thanks!
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Calculating pH with and without ionic strength
Replies
1
Views
2K
Chemistry Comparing methods of computing pH at equivalence point in titration
Replies
4
Views
1K
Chemistry How to find the pH of a galvanic cell (MIT OCW problem set)
Replies
2
Views
3K
Determining if the pH changes when a chemical is added
Replies
2
Views
3K
Chemistry How much NaOH I have to add to increase pH?
Replies
3
Views
5K
Chemistry How to take into account autoprotolysis in weak base solution?
Replies
8
Views
2K
Chemistry Solving pH Changes: Adding Acid to a Buffer or Water
Replies
16
Views
3K
How Do You Calculate pH in Titration of Dibasic Compounds?
Replies
18
Views
8K
Which formula to use to find the pH of a solution?
Replies
20
Views
3K
The relationship between pH and pOH at 70 ◦C/ 343.15 K
Replies
5
Views
3K

Hot Threads

Recent Insights

Back
Top