Friday
March 27, 2015

Homework Help: Chemistry

Posted by John on Wednesday, April 6, 2011 at 3:15am.

Calculate amount of solid NaF required to prepare a 250mL acidic buffer with pH=2.75. The initial molarity of HF is .25M but you only have .075L of it.

I have tried many different ways... the most recent and seems to be simplest was using H-H equaion and solving for the CB/CA ratio. Then equivalating this to mol NaF/ (M HF* V HF).... any suggestions?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - I can't figure out how to solve this problem: The Ka for ...
Chemistry - The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the ...
chemistry - The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the ...
chemistry - Of the following solutions, which has the greatest buffering ...
Chemistry - Calculate the ratio of NaF to HF required to create a buffer with a ...
Chemistry - Please help! I have spent hours trying to work these three problems...
CHEMISTRY - I have trouble how to resist pH in buffer solutions ( in acidic ...
Chemistry - You are given an assignment to make 250ml buffer solution having 0....
Chemistry - what volume of concentrated 18M H2SO4 is required to prepare 250mL ...
chemistry - Calculate the grams of substance required to prepare 250mL of 5%(wt/...

Members