Please explain the mechanism to me as well. Part A Calculate the pH of the solution...

Question

Question

Please explain the mechanism to me as well.

Part A Calculate the pH of the solution made by adding 0.50 mol of HOBr and 0.30 mol of KOBr to 1.00 L of water. The value of

Answer 1

Answer #1

[HOBr] = mol of HOBr / volume
= 0.50 mol / 1.00 L
= 0.50 M

[KOBr] = mol of KOBr / volume
= 0.30 mol / 1.00 L
= 0.30 M

Ka = 2*10^-9

pKa = - log (Ka)
= - log(2*10^-9)
= 8.699

use:
pH = pKa + log {[conjugate base]/[acid]}
= 8.699+ log {0.3/0.5}
= 8.477

Answer: 8.48

Answer 2

Similar Homework Help Questions

Calculate the pH of the solution made by adding 0.50 mol of HObr in 0.30 mol of KOBr to 1.00 L of water. The value of K...

Calculate the pH of the solution made by adding 0.50 mol of HObr in 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HObr is 2.0 * 10^-9
Part A 0.30 g of hydrogen chloride (HCl) is dissolved in water to make 2.5 L...

Part A 0.30 g of hydrogen chloride (HCl) is dissolved in water to make 2.5 L of solution. What is the pH of the resulting hydrochloric acid solution? Express the pH numerically to two decimal places. View Available Hint(s) A O ? O A pH = 2.56 Submit Previous Answers X Incorrect; Try Again; 3 attempts remaining Part B 0.35 g of sodium hydroxide (NaOH) pellets are dissolved in water to make 6.5 L of solution. What is the pH...
Part A Calculate the pH of a 0.10 M solution of barium hydroxide, Ba(OH)2 Express your...

Part A Calculate the pH of a 0.10 M solution of barium hydroxide, Ba(OH)2 Express your answer numerically using two decimal places. View Available Hint(s) 20 A20 0 2 ? pH Submit Part B Calculate the pH of a 0.10 M solution of NaOH Express your answer numerically using two decimal places. View Available Hint(s) VO ALDO ? Submit Part Part B ve a Calculate the pH of a 0.10 M solution of NaOH. Express your answer numerically using two...

Part A - 7 What is the pH of a buffer prepared by adding 0.809 mol...

Part A - 7 What is the pH of a buffer prepared by adding 0.809 mol of the weak acid HA to 0.507 mol of NaA in 2.00 L of solution? The dissociation constant K, of HA is 5.66 x 10 Express the pH numerically to three decimal places. View Available Hint(s) Ivo AED ? pH = Submit Part B What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume...
± pH Changes in Buffers Part A What is the pH of a buffer prepared by...

± pH Changes in Buffers Part A What is the pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.608 mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66×10−7. Express the pH numerically to three decimal places. Part B What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume change on the addition of the acid. Express...
Review Constants Periodic The temperature for each solution is carried out at approximately 297 K where...

Review Constants Periodic The temperature for each solution is carried out at approximately 297 K where K -1.00 x 10 Part A 0.10 g of hydrogen chloride (HCI) is dissolved in water to make 3.0 L of solution. What is the pH of the resulting hydrochloric acid solution? Express the pH numerically to two decimal places. View Available Hint(s) % AE O ? pH Submit Request Answer Part B 0.10 g of sodium hydroxide (NaOH) pellets are dissolved in water...

Part B . Calculate the pH of a 0.10 M solution of hypochlorous acid, HOCI. K....

Part B . Calculate the pH of a 0.10 M solution of hypochlorous acid, HOCI. K. of HOCI is 3.5 x 10-8 at 25°C. Express your answer numerically using two decimal places. View Available Hint(s) IVO | ΑΣφ pH Submit Part Calculate the pH of a 0.10 M solution of HCI. Express your answer numerically using two decimal places. View Available Hint(s) . AE pH OF Submit BERARE Provide Feedback
( 12 0127 Review Constants Periodic T What is the ph of a butler prepared by...

( 12 0127 Review Constants Periodic T What is the ph of a butler prepared by adding you mol of the weak acid HA 10 0 609 mol of NaA in 200 L of solution? The dissociation constant of HAI 5.66 x 10 Express the pH numerically to three decimal places View Available Hints) AED + O ? Submit Part B What is the pH after 0. 150 mol of HCl is added to the butter from PartA? Assume no...
Q2 Part B What is the pH at the equivalence point in the titration of 100.0...

Q2 Part B What is the pH at the equivalence point in the titration of 100.0 mL of 0.0500 M HOCI (Ka = 3.5 x 10-8) with 0.400 M NaOH? Express your answer to two decimal places. ΤΕΙ ΑΣΦ ? pH = 19.76 Submit Previous Answers Request Answer X Incorrect; Try Again A certain weak acid, HA, with a Ka value of 5.61 x 10-6, is titrated with NaOH. Part A A solution is made by titrating 8.00 mmol (millimoles)...

What is the pH of a 0.225 Mammonia solution? Express your answer numerically to two decimal...

What is the pH of a 0.225 Mammonia solution? Express your answer numerically to two decimal places. View Available Hint(s) IVO ALVA O ? pH = Submit Request Answer Part B What is the percent ionization of ammonia at this concentration? Express your answer with the appropriate units. View Available Hint(s) TH HÀ • • • Ea ? % ionization = Value Units