How many moles each of gold(III) chloride and sodium hydroxide did Employee X mix in his second reaction?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
icon
Related questions
Question

Conversation Transcript

 

Boss:  Please sit down, Employee X.  I understand that you have been preparing our gold(III) hydroxide.  Is that correct?

Employee XYes, Sir.  Is there a problem with the product?

Boss: No, the product is fine but our supply of gold(III) chloride has run very low.

Employee X: (nervously) Maybe that’s because I’m working so hard?

Boss: (seriously) Perhaps.  Please describe how you are making the gold(III) hydroxide.

Employee X: I mix the sodium hydroxide with the gold(III) chloride solution and our catalyst, then let it settle for about an hour and remove the clear liquid from the top.  Then I centrifuge (spin) the sludge.  I remove the rest of the liquid and finally, I let the material dry in the oven overnight.

BossThat’s not a very precise description.  How much gold(III) chloride and how much sodium hydroxide do you mix?

Employee XThe first time I used 280 g of gold(III) chloride and 12 g of sodium hydroxide.

Boss: Why did you use those amounts?

Employee XThose were the numbers I remember from my first day of work. But I only got about 24 g of gold(III)hydroxide. I was told the yield was too low and that I should get more than 200 g of product. So, I increased the amount of all reactants by 10 times.

Boss: (in a surprised voice) Everything?

Employee X: (nervously)Yes.

Boss: Do you have a copy of the laboratory notebook for the reaction specification from your first day at work?

Employee X: (sheepishly) No, I don't. It was easy to remember, so I didn't write it down.

Boss: (frowning) You must write down detailed notes on all reactions.

BossSo you mixed 2800 g of gold(III) chloride and 120 g of sodium hydroxide?

Employee XThat’s right, (pleased with himself) and I got about 248 g of gold(III) hydroxide, which is significantly higher than 200 g!

BossAnd what happened to the liquid portion of each reaction?

Employee XI dumped it down the drain,  since I had already isolated the product.

Boss: (heavy sigh) How many batches of product have you made with this second combination?

Employee X: Five batches a week for a month.

Boss: As you know gold is very expensive - about $77 per gram. And you made 20 batches?!

 

Boss: (seriously) This meeting is over. I have a suspicion that something is not right, but I don’t have the time to figure it out. I have hired ChemDetective to investigate this matter. We will resume production only after we have their report. You may take the next 2 days as casual leave. Someone will get in touch with you after we have seen the report from ChemDetective.

 

question

  1. How many moles each of gold(III) chloride and sodium hydroxide did Employee X mix in his second reaction?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Electrochemical Cells
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY