How Much Will the pH Change When Adding Acid to a Buffered Solution?

Thread starter sunnyorange
Start date Nov 20, 2005
Tags

Acid

AI Thread Summary

The discussion revolves around calculating the pH change in a buffered solution after adding a specific amount of acid. A 200 mL beaker containing a 0.1M acetic acid buffer at pH 5.20 is used as the baseline. An addition of 8.60 mL of a 0.380 M hydrochloric acid solution is proposed. The pKa of acetic acid is noted as 4.76, which is crucial for determining the pH change. Accurate units and species involved are emphasized for a precise calculation.

Nov 20, 2005

sunnyorange

I need help:

A beaker with 200 of a 0.1M acetic acid buffer with a pH of 5.20 is sitting on a benchtop. A student adds 8.60 of a 0.380 solution to the beaker. How much will the pH change? The of acetic acid is 4.76.

Physics news on Phys.org

Nov 20, 2005

GCT

Science Advisor

Homework Helper

you need to be more specific about the units and species involved.

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 »