Question

A buffer is prepared by mixing 50.0 mL of 0.050 M acetic acid and 20.0 mL...

A buffer is prepared by mixing 50.0 mL of 0.050 M acetic acid and 20.0 mL of 0.10 M sodium hydroxide. a) What is the pH? b) How many grams of HCl must be added to 25.0 mL of the buffer to change the pH by 0.07 units?

Homework Answers

Answer #1

I have tried to explain it as simply as I can, if you still have any doubt feel free to comment. If you are satisfied with the answer, do give it a thumbs up.

Note- There is a correction. Since in part b the volume is given in milli litres i.e., 25 mL, so value of acetate ion and acetic acid will also come in milli moles i.e.,0.714 and 0.178 milli moles respectively. Subsequently, the amount of HCl will also come in milli moles i.e., 0.0248 milli moles which corresponds to 0.0009 g.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate the pH of a buffer solution prepared by mixing 50.0 mL of 1.00 M lactic...
Calculate the pH of a buffer solution prepared by mixing 50.0 mL of 1.00 M lactic acid and 25.0 mL of 0.75 M sodium lactate.
QUESTION 1: A buffer is prepared by mixing 192 mL of 0.452 M HCl and 0.485...
QUESTION 1: A buffer is prepared by mixing 192 mL of 0.452 M HCl and 0.485 L of 0.400 M sodium acetate. (See this table.) pH is 4.83. How many grams of KOH must be added to 0.500 L of the buffer to change the pH by 0.18 units? QUESTION 2: 60.0 mL of a 0.350 M solution of a weak acid are titrated with 0.250 M NaOH. What is the pH when 57% of the acid has been titrated?...
A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3(aq) with 50.0 mL...
A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3(aq) with 50.0 mL of 0.300 M NH4Cl(aq). The pKb of NH3  is 4.74. 7.50 mL of 0.125 M NaOH is added to the 100.0 mL of the original buffer solution prepared in Question 1 (no HCl added). Calculate the new NH3 concentration for the buffer solution. Calculate the new NH4Cl concentration for the buffer solution. Calculate the new pH of the solution.
A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared....
A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal places. Calculate the pH when 21.1 mL of 0.014 M HCl is added to 100.0 mL of the above buffer.
A buffer solution is prepared by mixing 78.9 mL of 0.0419 M acetic acid with 35.9...
A buffer solution is prepared by mixing 78.9 mL of 0.0419 M acetic acid with 35.9 mL of 0.0317 M sodium acetate. A table of pKa values can be found here. 1. Calculate the pH (to two decimal places) of this solution. Assume the 5% approximation is valid and that the volumes are additive. 2. Calculate the pH (to two decimal places) of the buffer solution after the addition of 1.88 g of sodium acetate (NaCH3COO) to the buffer solution...
A)what is the pH of a solution made by mixing 465 ml of .10 M hydrochloric...
A)what is the pH of a solution made by mixing 465 ml of .10 M hydrochloric acid and 285 ml of .15 M sodium hydroxide? B)What is the pH of a buffer solution prepared from 0.21 mol NH3 and .39 mol NH4NO3 dissolved in 1.00L of solution? C) what is the pH in part B if >0.050 mol of Hcl is added? if 0.050 mol of NaOH is added?
a buffer is prepared by mixing 500 ml of 0.2 M Na2HPO4 with 500 ml of...
a buffer is prepared by mixing 500 ml of 0.2 M Na2HPO4 with 500 ml of 0.4 M NaH2PO4. a) what is the pH of this buffer B) if 10ml of 1 M HCL was added to this buffer what change in pH would be observed (ignore any change in volume) c) what would the final pH be if you added the same quantity of acid to 1 l of H2O (pH 7) please show all steps
For the titration of 20.0 mL of 0.150 M acetic acid with 0.100 M sodium hydroxide,...
For the titration of 20.0 mL of 0.150 M acetic acid with 0.100 M sodium hydroxide, determine the pH when: (a) 20.0 mL of base has been added ________ (b) 30.0 mL of base has been added ________
A buffer is prepared by mixing 25.0 ml of 1.00 NaC2H3O2 with 25.0 ml of 0.900...
A buffer is prepared by mixing 25.0 ml of 1.00 NaC2H3O2 with 25.0 ml of 0.900 M HC2H3O. If 20 ml of 0.50 M HCl is added to the initial buffer solution, what is the pH?
What is the pH of a buffer prepared by mixing 20.0 mL of a 0.277 M...
What is the pH of a buffer prepared by mixing 20.0 mL of a 0.277 M HNO2 solution with 30.0 mL of a 0.170 M NaNO2 solution?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT