In the following solutions, what is the change in hydrogen ion concentration? (how many times more or less hydrogens are there from before to after? A pH of 4 changes to a pH of 7.   A pH of 10 changes to a pH of 8.   2,Determine the pH of a solution that has a hydrogen ion concentration [H+] equal to 3.2x10-5 mol/L.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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  1. In the following solutions, what is the change in hydrogen ion concentration? (how many times more or less hydrogens are there from before to after?
    1. A pH of 4 changes to a pH of 7.

 

  1. A pH of 10 changes to a pH of 8.

 

2,Determine the pH of a solution that has a hydrogen ion concentration [H+] equal to 3.2x10-5 mol/L. 








3,Determine the hydrogen ion concentration of a solution that has a pH of 9.0. 








4, Determine the pH of a solution that contains 6.5x10-3 mol/L of OH- ions. 




5, What is the purpose of a titration?

 

6, What is the endpoint of a titration?



7, Why should at least 3 trials always be done for a titration?

 

  1. Use the following neutralization reaction to answer the questions: 2HCl(aq) + Ca(OH)2(aq) → CaCl2(aq) + 2H2O(l)
    1. Determine the number of moles of HCl needed to perfectly neutralize 0.037 moles of Ca(OH)2. 






  1. Starting with 0.037 moles of Ca(OH)2, what would be the concentration of CaCl2(aq) if the total volume of the solution is 500.0mL?



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