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

Author Question: A student titrates an unknown weak acid, HA, to a pale pink phenolphthalein endpoint with 25.0 mL of ... (Read 77 times)

jc611

  • Hero Member
  • *****
  • Posts: 552
on: Mar 21, 2021
A student titrates an unknown weak acid, HA, to a pale pink phenolphthalein endpoint with 25.0 mL of 0.100 M NaOH. The student then adds 13.0 mL of 0.100 M HCl. The pH of the resulting solution is 4.7. Which of the following is true?

◦ At pH 4.7, half the conjugate base, A–, has been converted to HA.
◦ The pKa of the acid is 4.7.
◦ The pKa of the acid is less than 4.7.
◦ The pKa of the acid is greater than 4.7.
◦ More than one of these is correct.
Chemistry: An Atoms First Approach ¦ Zumdahl, DeCoste ¦ 3rd Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by jc611 on Mar 21, 2021

mistyjohnson

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Mar 21, 2021
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 25% of students answer this correctly


jc611

  • Member
  • Posts: 552
Reply 2 on: Mar 21, 2021
Gracias!

ghepp

  • Member
  • Posts: 361
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

The titration curve of the buffer acetic acid (CH3COOH) The titration curve of the buffer acetic acid (CH3COOH)
Acid–base imbalances Acid–base imbalances
Acid Base Mnemonic Acid Base Mnemonic
Photographer unknown, Man with Big Shoes. Photographer unknown, Man with Big Shoes.
A general scheme for adding one amino acid in solid-phase peptide synthesis A general scheme for adding one amino acid in solid-phase peptide synthesis
Versatility of the pyridoxal phosphate Schiff base (aldimine) in amino acid reactions Versatility of the pyridoxal phosphate Schiff base (aldimine) in amino acid reactions
Video: Enzyme structure - Properties of enzymes

For a complete list of videos, visit our video library