In the spooky chemistry lab, you spot a 50mL solution of 6.0M hydrochloric acid.   What is the pH of this acid?  Yeouch...that sure would hurt if it spilled on you!  You remember from when we learned about dilutions that adding water reduces the concentration of a solution.  Sweet.  You decide to add 950mL of water to the solution.  What is the new pH of the hydrochloric acid solution? Ok, weird one here, but this is Honors Chem, so challenges are always welcome.  Yippee.  So, let’s rewind back to the 50mL solution of 6.0M HCl.  Let’s say that you want to dilute this solution so that it has a pH equal to exactly 7.  How much water would you need to add to it in order to achieve this goal?  (HINT: This is so unrealistic...which is why no chemist would ever do it...but it’s still fun to do the math & determine why it’s so crazy!)

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...
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  • In the spooky chemistry lab, you spot a 50mL solution of 6.0M hydrochloric acid.  
  • What is the pH of this acid? 
  • Yeouch...that sure would hurt if it spilled on you!  You remember from when we learned about dilutions that adding water reduces the concentration of a solution.  Sweet.  You decide to add 950mL of water to the solution.  What is the new pH of the hydrochloric acid solution?
  • Ok, weird one here, but this is Honors Chem, so challenges are always welcome.  Yippee.  So, let’s rewind back to the 50mL solution of 6.0M HCl.  Let’s say that you want to dilute this solution so that it has a pH equal to exactly 7.  How much water would you need to add to it in order to achieve this goal?  (HINT: This is so unrealistic...which is why no chemist would ever do it...but it’s still fun to do the math & determine why it’s so crazy!)

 

 

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