Erosion in mines can lead to acidic run off, contributing to deterioration and extirpation of aquatic life in near by streams and oceans. One treatment of acid mine drainage is the addition of organic ash. The higher the concentration of ash, a, the higher the pH, P, (less acidic) as given in the equation and plot below. (See attached image for graph) P (a) = 7 log(a + 4) A. What is the base of the logarithm in equation (2)? B. You want your stream to have a pH of 6.8 how much ash do you have to add (in grams per liter g/L)? Show all work

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Erosion in mines can lead to acidic run off, contributing to deterioration and extirpation of aquatic life in near by streams and oceans. One treatment of acid mine drainage is the addition of organic ash. The higher the concentration of ash, a, the higher the pH, P, (less acidic) as given in the equation and plot below. (See attached image for graph)

P (a) = 7 log(a + 4)

A. What is the base of the logarithm in equation (2)?

B. You want your stream to have a pH of 6.8 how much ash do you have to add (in grams per liter g/L)?

Show all work!

Hd
14
12
10
8
6
4
2
5
10
g/L Ash
15
20
25
Transcribed Image Text:Hd 14 12 10 8 6 4 2 5 10 g/L Ash 15 20 25
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