SOLUTION: I don't understand how to use the appropriate formulas for these logarithmic models. a) The hydrogen ion concentration of spinach is about 3.2 x 10^ -6 . Calculate the pH of sp

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: I don't understand how to use the appropriate formulas for these logarithmic models. a) The hydrogen ion concentration of spinach is about 3.2 x 10^ -6 . Calculate the pH of sp      Log On


   



Question 1058299: I don't understand how to use the appropriate formulas for these logarithmic models.
a) The hydrogen ion concentration of spinach is about 3.2 x 10^ -6 . Calculate the pH of spinach.
b) The pH of ammonia is 9.8 . Calculate its hydrogen ion concentration
c) A jet airplane generates 100 watts per square meter at a distance of 100 feet. Find the decibel level for a jet airplane.

Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
(a)
-log%2810%2C%283.2%2A10%5E%28-6%29%29%29; pH means, negative logarithm of...


(b)
-log%2810%2Cc%29=9.8
10%5E%28-9.8%29=c
c=1.6%2A10%5E%28-10%29