Chemistry Homework Help

24/7 Chemistry Homework Help

Get step-by-step solutions from expert tutors.

How it works?

Ask a question

Type, take a picture, or paste your question with all necessary details to ensure high-quality responses.

Get an answer in less than 24hrs

Once our tutors receive the question, they'll begin. You'll get an email once the solution is ready.

Get Notified

We will send you email and text notification to let you know when your question is answered.

Browse Homework Solutions

18 solutions

Acid Base Indicators

Q. Which indicator would be the best to use for a titration between 0.10 M HCOOH with 0.10 M NaOH? You will probably need to consult the appropriate table in the book. Selected Answer: IncorrectD. alizarin yellow R, color change at pH 10-12 Correct Answer: CorrectA. phenolphthalein, color change at pH 8-10

Solved • Mar 24, 2020

Acid Base Indicators

Q. Alizarin yellow R, Ka = 7.9 x 10^-12, is yellow in its protonated from (HX) and red in its ionized form (X^-). At what pH will alizarin yellow R be a perfect orange color? Express your answer to one decimal place. What color would a alizarin yellow R solution be at pH = 13? a) yelow b) orange c) red

Solved • Mar 24, 2020

Acid Base Indicators

Q. Bromocresol purple is an indicator that changes color over a range from pH = 5.2 to pH = 6.8. What is Ka of bromocresol purple? Express your answer to one significant figure.

Solved • Mar 24, 2020

Acid Base Indicators

Q. Which indicator would be the best to use for a titration between 0.10 M HCOOH with 0.10 M NaOH? You will probably need to consult the appropriate table in the book.

Solved • Mar 23, 2020

Acid Base Indicators

Q. The acid form of an indicator is yellow and its anion is blue. The Ka of this indicator is 10^-5. What will be the approximate pH range over which this indicator changes color? a) 6 < pH < 8 b) 3 < pH < 5 c) 5 < pH < 7 d) 4 < pH < 6

Solved • Mar 12, 2020

Acid Base Indicators

Q. Phenol red is an indicator that changes color over a range from pH = 6.4 to pH = 8.0. What is Ka of phenol red? Express your answer to one significant figure.

Solved • Feb 26, 2020

Acid Base Indicators

Q. What color would a bromothymol blue solution be at pH = 9? a) yellow b) green c) blue

Solved • Feb 26, 2020