Answer to Question #133405 in Inorganic Chemistry for Darius

Question #133405
Six litres of 0.4M 3-(N-morpholino) propane sulfonic acid (MOPS) buffer of pH 7.8 are required. Available in the laboratory are 10M HCl and 10M NaOH and the zwitterionic form of MOPS (M.Wt = 210.3). The pKa for the MOPS zwitter ion is 7.2. Describe, showing the relevant calculations, the procedure for preparing the buffer . If 10ml of 10M HCl was added to 1 litre of the above buffer (question 9) what would be the resulting pH?
What would be the resulting pH if 10ml of 10M HCl were added to 1 litre of pure water?
1
Expert's answer
2020-09-21T06:33:28-0400

The following formula is used to calculate the pH of the given buffer

Rearranging the formula


The concentration of the buffer solution is

The concentration of MOPS and Na-salt required can be now evaluated

Calculate the number of moles of HA and BA


The total number of moles of the solution is

Mass of MOPS=

Volume of NaOH=1.92/10=0.192 L


Mix 504.7 g of MOPS with 0.192 L of 10M NaOH solution

In a flask, dissolve this mixture with distilled water up to 6L after the reaction is complete




Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment

Ask Your question

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS