Module 6: Lesson 5

 

Self-Check 3

2. Question 16 on page 402 of the textbook
   16.  
       1. To solve this question, the formula pH = −log[H+] should be used.
          
          
           
          
          
          

          Thus, the hydrogen ion concentration in a patient with a pH of 7.0 is 10−7 mol/L.

       2. The formula that was used in Try This 4 can be used here.
          
          
           
          
          
          Substituting the known values gives the following:
          
          
           
          
          
          Converting from logarithmic form to exponential form will allow the answer to be solved.
          
          
           
          
          
          Thus, acid rain with a pH of 4.5 is approximately 12.6 times as acidic as normal rain with a pH of 5.6.
       3. The formula that was used in Try This 4 can be used here.
          
          
           
          
          
          Substitute the known values into the equation.
          
          
           
          
          
          Solve for the unknown value.
          
          
           
          
          
          Thus, the pH of the conditioner is approximately 3.4.

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