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 103 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
Wow, this really help

robbielu01

  • Member
  • Posts: 336
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

acid base balence acid base balence
Fire Pink Fire Pink
Weak Acids and Weak Bases Weak Acids and Weak Bases
The a-Oxidation Pathway for Phytanic Acid Oxidation The a-Oxidation Pathway for Phytanic Acid Oxidation
Amino acid conversion to the corresponding a-keto acid by transamination or oxidative deamination Amino acid conversion to the corresponding a-keto acid by transamination or oxidative deamination
At what pH is the amino acid glycine with a Ka of 2.51 × 10-10 sixty-six (66%) percent ... At what pH is the amino acid glycine with a Ka of 2.51 × 10-10 sixty-six (66%) percent ...
Video: Gas exchange - partial pressure, locations, external and internal respiration

For a complete list of videos, visit our video library