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WWW #14

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Acids and Bases – What pHun!

 

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1. What acid and base combine in a neutralization reaction to yield Sr3(PO4)2?
 
 2. Pick an acid and a base from the list below. Write a balanced chemical equation for the neutralization reaction using the acid and base you chose. (I know you can't enter subscripts in the box.)
 
  Acid   Base
HNO3 Mg(OH)2
HClO4 Ca(OH)2
HBr Sr(OH)2
 
3. Assume that your base is available as an aqueous solution with a concentration of 0.200 M. What volume of your base will it take to neutralize 25.0 mL of your acid if your acid is 0.300 M. (Note: The answer is not 37.5 mL) You must explain the steps you used in your calculation.
 
4. At the end of your titration in question 3, what substances are present? (Hint: Is there any acid remaining? Any base?)
 
5. Consider a titration of 30 mL of acetic acid (0.200 M) with sodium hydroxide (0.200 M). What volume of NaOH is needed to neutralize the acid?
 
6. What is the salt you are forming? What is the conjugate acid of the anion of this salt?
 
7. What volume of sodium hydroxide would be used to get half-way to neutralization?
 
8. What substances are present in your flask when you have neutralized half of the acid?
 
9.

What is the name for the mixture in question 8? (Hint: See page 280 in your text.)
 

 

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