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# use pH value to find hydrogen ion concentration

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Please I answered all of them except b, therefore, I need help with answer b and also could you verify my answers please for a, c, and d? if they are wrong what would it be?
Thank you

-The pH of uncontaminated rain water is about 5.6. The pH of rain falling in Cleveland, OH is 4.2 and that in Omaha, NE is 5.5.

a. In which city is the rain more acid? Cleveland, Ohio

b. Using a calculator, determine the number of liters of rain water which would provide 1 mole of hydrogen ions for each city.

c. What is the concentration of hydrogen ions in the rainfall of each city? [H] 6.3 ^ -5 for Cleveland.
And for Omaha would be [H] 3.2 ^ -6

d. What is the concentration of hydroxide ions in the rainfall of each city? [OH] 9.9 ^ -11 for Cleveland.
And for Omaha would be [OH] 1.1 ^ -11

https://brainmass.com/chemistry/environmental-chemistry/ph-value-find-hydrogen-ion-concentration-460982

#### Solution Preview

Hi there,

Thanks for allowing me to work on your questions. Here is my answer:

b. First, calculate the concentration of hydrogen ions:
cleveland OH, [H+]=10^(-4.2) mol.L^-1. volume of the rain that can produce 1 mole of hydrogen ions: ...

#### Solution Summary

This solution provides some explanation how to use pH value to find hydrogen ion concentration

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## Exponential and logarithmic functions

Part 1: Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents.

Find the pH of a substance of your choice that is alkaline (basic). Using this pH, show how to find the hydrogen ion concentration, [H+], of the substance using the formula. Discuss the meaning of pH and [H+], the pH scale and why your chosen substance is alkaline. Use scientific notation or enough decimal places so that your answer has at least 3 place values. For example, either use 3.44*10-9 or 0.00000000344.

Part 2: Part 1: Suppose that the number of new homes built, H, in a city over a period of time, t, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of homes built can be modeled by an exponential function, H= p * at , where p is the number of new homes built in the first year recorded. If you were a homebuilder looking for work, would you prefer that the value of a to be between 0 and 1 or larger than 1? Explain your reasoning. Be sure to reference your sources using APA style.

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