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tyrant
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Homework Statement
A mixture is made by adding 25 ml of 0.100M HCl to 100ml of 0.025M ammonia hydroxide. Kd = 1.76 x 10^-5 . My task is to calculate the pH.
Homework Equations
I think this is the reaction that follows:
NH4OH + HCl <--> NH4 + H2O + Cl
The Attempt at a Solution
I have calculated the concentrations in the mixture:
c(NH4OH) = (0.025mol/l x 0.100l) / ( 0.100l + 0.025l) = 0.02 mol/l
c(HCl) = (0.100 mol/l x 0.025l) / ( 0.100l + 0.025l) = 0.02 mol/l
NH4OH + HCl <---> NH4 + H2O + Cl
Initial C 0.02M 0.02M 0
final C 0 0 0.02M
After this I'm not sure what happens, I have tried calculating the concentration of hydrogen ions formed by this reaction NH4 <---> NH3 + H ( I guess Kd is for this reaction) and calculating the pH then but it was wrong.
My teacher refuses to help me solve this and won't even tell me where I go wrong.