A soil analysis was done for the exchangeable cations in the soil and the results were as follows:
Ca = 7 cmol/kg
Mg = 4 cmol/kg
K = 585 mg/kg (atomic wt. Potassium is 39 g/mol)
Na = 1 cmol/kg
Al= 135 mg/kg (atomic wt. Aluminum is 27 g/mol)
H= 3 cmol/kg
Calculate the CEC of this soil –do not forget the units and please show example calculations
First we would convert the units to meq /100 gm
Ca = 7 cmol/kg = 7 meq /100 gm
Mg = 4 cmol/kg=4 meq /100 gm
K = 585 mg/kg = (585 / 390) cmol/kg = 1.5 cmol/kg =1.5 meq /100 gm
Na = 1 cmol/kg=1 meq /100 gm
Al= 135 mg/kg = (135 / 270) cmol/kg = 0.5 cmol/kg =0.5 meq /100 gm
H= 3 cmol/kg=3 meq /100 gm
Hence, CEC of the soil is = (7 + 4 + 1.5 + 1 + 0.5 + 3) meq /100 gm = 17 meq /100 gm
A soil analysis was done for the exchangeable cations in the soil and the results were...
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I keep getting these wrong. Can you please show me how they are worked out? Thank you so much! 10. A soil analysis was performed to determine the cation exchange capacity based on exchangeable Na, K, Al, and Mg, and the results were: 4 cmol Na/kg 4 cmol K/kg 3 cmol Al/kg 2cmol Mg/kg Calculate the Cation Exchange Capacity. 11. A similar analysis was performed for the following cations. However, this time the results were reported as mg of the cation per kg...
The highlighted questions worked out please!
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