pH calculation of mixture 16.42

Question

Question

pH calculation of mixture 16.42

a] 160.0 mL of 0.25M HF with 225.0 mL of 0.32M NaF
b] 165.0 mL of 0.11M C2H5NH2 with 285.0 mL of 0.20M C2H5NH3Cl

THANKS!

science chemistry

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

a) millimoles of HF = 160 x 0.25 = 40
millimoles of NaF = 225 x .32 = 72
final volume = 160 + 225 ml = 385 ml
[HF] = 40/385 M = 0.104M
[NaF] = 72/385 M = 0.187M
pKa of HF = 3.14
pH = pKa + log[NaF]/[HF]
pH = 3.14 + log(0.187/0.104)
pH = 3.14 + 0.255
pH = 3.359

answered by: Tiny

Add a comment

Answer 2

Similar Homework Help Questions

1.) 160.0 mL of 0.24 M HF with 225.0 mL of 0.30 M NaF find pH...

1.) 160.0 mL of 0.24 M HF with 225.0 mL of 0.30 M NaF find pH 2.) 180.0 mL of 0.11 M C2H5NH2 with 275.0 mL of 0.21 M C2H5NH3Cl find pH 3.) Calculate the ratio of NaF to HF required to create a buffer with pH = 3.80. find [NaF][HF] = - My answer was 2.45 and it said it was wrong
Use the Henderson–Hasselbalch equation to calculate the pH of each solution: Part B a solution that...

Use the Henderson–Hasselbalch equation to calculate the pH of each solution: Part B a solution that contains 0.775% C5H5N by mass and 0.950% C5H5NHCl by mass. ( Express your answer using two decimal places.) Part C a solution that is 12.0 g of HF and 22.5 g of NaF in 125 mL of solution (Express your answer using two decimal places.) - Calculate the pH of the solution that results from each of the following mixtures. Part A4 150.0 mL...
Calculate the pH of the solution that results from each of the following mixtures. A. 140.0...

Calculate the pH of the solution that results from each of the following mixtures. A. 140.0 mL of 0.27 M HF with 220.0 mL of 0.31 M NaF B. 170.0 mL of 0.12 M C2H5NH2 with 275.0 mL of 0.20 M C2H5NH3Cl

1) Calculate the pH of the solution that results from each of the following mixtures. A) 150.0 mL...

1) Calculate the pH of the solution that results from each of the following mixtures. A) 150.0 mL of 0.26 M HF with 225.0 mL of 0.32 M NaF B) 165.0 mL of 0.12 M C2H5NH2 with 275.0 mL of 0.22 M C2H5NH3Cl 2) A) As a technician in a large pharmaceutical research firm, you need to produce 100. mLof a potassium dihydrogen phosphate buffer solution of pH = 6.91. The pKa of H2PO4− is 7.21. You have the following...
140.0 mL of 0.25 M HF with 230.0 mL of 0.32 M NaF The Ka of hydrofluoric acid...

140.0 mL of 0.25 M HF with 230.0 mL of 0.32 M NaF The Ka of hydrofluoric acid is 6.8 x 10−4. Express your answer using two decimal places. 185.0 mL of 0.11 M C2H5NH2 with 270.0 mL of 0.20 M C2H5NH3Cl Express your answer using two decimal places.
29. E 2.- b. 125.0 mL of 0.10 M NH; WILT JUUM 16. Calculate the pH...

29. E 2.- b. 125.0 mL of 0.10 M NH; WILT JUUM 16. Calculate the pH of the solution that results from each mixture. a. 150.0 mL of 0.25 M HF with 225.0 mL of 0.30 M NaF b. 175.0 mL of 0.10 M C H NH, with 275.0 mL of 0.20 M CH,NH4Cl 17. Calculate the ratio of NaF to HF required to create a buffer with pH = 4.00. IT YILC concentration

Calculate the pH of the solution Part B 165.0 mL of 0.10 M C2H,NH2 with 270.0...

Calculate the pH of the solution Part B 165.0 mL of 0.10 M C2H,NH2 with 270.0 mL of 0.22 M C2H5NH3Cl Express your answer using two decimal places.
You may want to reference (Pages 659 - 662) section 16.3 while completing this problem. Calculate...

You may want to reference (Pages 659 - 662) section 16.3 while completing this problem. Calculate the pH of the solution that results from each of the following mixtures. Part A 160.0 mL of 0.25 M HF with 2250 mL of 0.32 M NaF The K, of HF is 6.6 x 10-4 Express your answer using two decimal places. ITO AL OO ? pH = Submit Request Answer Part B You may want to reference (Pages 659 - 662) section...
What is the pH of the mixture made by adding 75.0 mL of 0.15 M NaF,...

What is the pH of the mixture made by adding 75.0 mL of 0.15 M NaF, 100.0 mL of 0.12M HF and 75.0 mL of 0.10 M KOH?

Use the Henderson–Hasselbalch equation to calculate the pH of each solution: Part A Calculate the ratio...

Use the Henderson–Hasselbalch equation to calculate the pH of each solution: Part A Calculate the ratio of NaF to HF required to create a buffer with pH = 3.85. Express your answer using two significant figures. Part B a solution that contains 1.33% C2H5NH2 by mass and 1.39% C2H5NH3Br by mass Express your answer using two decimal places. Part C a solution that is 15.0 g of HC2H3O2 and 10.5 g of NaC2H3O2 in 150.0 mL of solution Express your...

pH calculation of mixture 16.42

Homework Answers

Add Answer to:
pH calculation of mixture 16.42

Post as a guest

Earn Coins

1.) 160.0 mL of 0.24 M HF with 225.0 mL of 0.30 M NaF find pH...

Use the Henderson–Hasselbalch equation to calculate the pH of each solution: Part B a solution that...

Calculate the pH of the solution that results from each of the following mixtures. A. 140.0...

1) Calculate the pH of the solution that results from each of the following mixtures. A) 150.0 mL...

140.0 mL of 0.25 M HF with 230.0 mL of 0.32 M NaF The Ka of hydrofluoric acid...

29. E 2.- b. 125.0 mL of 0.10 M NH; WILT JUUM 16. Calculate the pH...

Calculate the pH of the solution Part B 165.0 mL of 0.10 M C2H,NH2 with 270.0...

You may want to reference (Pages 659 - 662) section 16.3 while completing this problem. Calculate...

What is the pH of the mixture made by adding 75.0 mL of 0.15 M NaF,...

Use the Henderson–Hasselbalch equation to calculate the pH of each solution: Part A Calculate the ratio...

pH calculation of mixture 16.42

Homework Answers

Add Answer to: pH calculation of mixture 16.42

Post as a guest

Earn Coins

Add Answer to:
pH calculation of mixture 16.42