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If you wanted to make a 3 liter solution of 500 mM formic acid buffer at ph 3.9 how many grams each of sodium formate (MW=68g/mol) and formic acid (MW=46g/mol) would you add... 98.6 g sodium formate and 2.3g of formic acid or 20.2 sodium formate and 9.4g formic acid OR 60.5g sodium formate and 28.1 g formic acidPlease show steps! thanks

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Reid Wolff
Reid WolffLv2
28 Sep 2019

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Related questions

Need 3 and 4 answered.


A) how many mL of NaCHO2 solution should she add to 20.0 mL of the 0.10 M HCHO2 to make a buffer?
B) write a net ionic equation to explain why the pH didn't go up to about 10

PLEASE HELP ANSWERING THE 3 PRELAB QUESTIONS FOR A BUFFER EXPERIMENT. Here is the back ground information:

1. Imagine you add some HCl to two solutions. One contains a pH buffer and the other is just plain water with no buffer. a. How would the addition of HCl affect the pH of these solutions? b. Would these solutions’ pHs change to the same extent if the same amount of HCl were added? Why or why not?

2. If a solution contained formic acid (HCO2H) at a concentration of 0.414 M and its conjugate base, formate (HCO2  ), at a concentration of 0.303 M, what would the pH of the solution be? The pKa of formic acid is 3.77

3. You are asked to make a buffer to a pH of 3.00. Which acid (and its conjugate base) would be a good choice for this? Explain your choice.

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