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If a soil has 30 meq Ca/100 g soil, 5 meq H/100 g soil, and 10 meq Mg/100 g soil, how much ppm Ca, H, and Mg does this come down to?

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Answer :

To convert milliequivalents per 100 grams of soil (meq/100 g) to parts per million (ppm), we need to consider the molecular weight of the elements involved.

The formula to convert meq/100 g to ppm is as follows:

ppm = (meq/100 g) * (atomic weight / 10)

Given the following values:

Ca: 30 meq/100 g

H: 5 meq/100 g

Mg: 10 meq/100 g

We can calculate the ppm values for each element:

1. Calcium (Ca):

Atomic weight of Ca = 40.08 g/mol

ppm Ca = (30 meq/100 g) * (40.08 g/mol / 10)

= 120 ppm

2. Hydrogen (H):

Atomic weight of H = 1.01 g/mol

ppm H = (5 meq/100 g) * (1.01 g/mol / 10)

= 0.505 ppm

3. Magnesium (Mg):

Atomic weight of Mg = 24.31 g/mol

ppm Mg = (10 meq/100 g) * (24.31 g/mol / 10)

= 24.31 ppm

Therefore, the converted values in parts per million (ppm) are as follows:

Ca: 120 ppm

H: 0.505 ppm

Mg: 24.31 ppm

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