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 105 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
Excellent

aliotak

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Crassulacean acid metabolism, or CAM, photosynthesis Crassulacean acid metabolism, or CAM, photosynthesis
pink-necked green pigeon pink-necked green pigeon
Xenophon (430–357 B.C.E.) Biographer of Socrates and his student as a youth. In addition to four ... Xenophon (430–357 B.C.E.) Biographer of Socrates and his student as a youth. In addition to four ...
Branched-chain amino acid oxidation, fatty acid b-oxidation, and the citric acid cycle share a commo Branched-chain amino acid oxidation, fatty acid b-oxidation, and the citric acid cycle share a commo
The d-aminolevulinic acid syntheses reaction The d-aminolevulinic acid syntheses reaction
Student Perspective of Research Student Perspective of Research
Video: Lipid catabolism ( ketogenesis and oxidation of glycerol) and Lipid anabolism (lipogenesis)

For a complete list of videos, visit our video library