This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in ... (Read 88 times)

CORALGRILL2014

  • Hero Member
  • *****
  • Posts: 525
on: Feb 15, 2020

Question 1

Which statement about buffers is true?
◦ A buffer does not change pH on addition of a strong acid or strong base.
◦ Buffers have a pH = 7.
◦ Buffers consist of a strong acid and its conjugate base.
◦ Buffers resist change in pH upon addition of small amounts of strong acid or strong base.

Question 2

What is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL? The Ka2 for dihydrogen phosphate is 6.2 × 10-8 and the equilibrium reaction of interest is

H2PO4-(aq) + H2O(l) ⇌ H3O+(aq) + HPO4-(aq).


◦ 7.38
◦ 7.03
◦ 7.17
◦ 7.58
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by CORALGRILL2014 on Feb 15, 2020

peilian

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Feb 15, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 39% of students answer this correctly


CORALGRILL2014

  • Member
  • Posts: 525
Reply 2 on: Feb 15, 2020
Wow, this really help

robbielu01

  • Member
  • Posts: 336
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Three Chamber Heart -- Circulatory System Three Chamber Heart -- Circulatory System
The dynamic nature of the endomembrane system The dynamic nature of the endomembrane system
Procedures and Diagnostic Tests Related to the Female Reproductive System Procedures and Diagnostic Tests Related to the Female Reproductive System
Canister pressure should be adjusted to 5 PSI below system fuel pressure. An alternative for ... Canister pressure should be adjusted to 5 PSI below system fuel pressure. An alternative for ...
The two-system view of the stress response. The two-system view of the stress response.
The Female Reproductive System (2 of 2) The Female Reproductive System (2 of 2)
Video: Decubitus Ulcer

For a complete list of videos, visit our video library