What is the cation exchange capacity (in meq/100 g) and base saturation (in %) of a...
What is the cation exchange capacity (in meq/100 g) and base saturation (in %) of a 200 g soil sample that contains the following amounts of exchangeable cations: 360mg Ca 2+, 46mg Na+, 312mg K+, 216mg Mg2+, 100mg Al3+, and 20mg H+. Use the following molar weights: Ca2+= 40.1 g/mol; Na+= 23.0 g/mol; K+= 39.1 g/mol; Mg2+= 24.3 g/mol; Al3+= 27 g/mol and H+ is 1 g/mol.
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What is the cation exchange capacity (in meq/100 g) and base
saturation (in %) of a...
Please Answer: CALCULATION QUESTION 1 (A) Calculate the number of cmol of Al3+ cations needed to...
Please Answer: CALCULATION QUESTION 1 (A) Calculate the number of cmol of Al3+ cations needed to replace 10 cmolc of Ca2+ by cation exchange in a soil. (B) How many grams of Al3+ does this correspond to? (you’ll need the atomic weight of Al, which is 27 g/mol, to calculate this) CALCULATION QUESTION 2 A soil sample (500 g) contains the following amounts of exchangeable cations: Ca2+= 9 cmolc , Mg2+= 3 cmolc , K+= 1 cmolc , Al3+= 3...
Based on the sample calculation, the CEC of the soil was 50.8 meq/100g and the equivalent...
Based on the sample calculation, the CEC of the soil was 50.8 meq/100g and the equivalent weight of Ca2+ (one of the base cations) extracted by ammonium acetate solution was 3.13 meq/100g. The ammonium acetate solution also contains 150 mg K+/L, 75 mg Na+/L, and 83 mg Mg2+/L. calculate the equivalent weight of K+, Na+, and Mg2+ in a 5 g soil: 35 mL extractant. Given all these values, compute the base saturation of the soil.
help with cation exchange capactity question 16. Suppose that 1 g of dry soil is mixed...
help with cation exchange capactity question
16. Suppose that 1 g of dry soil is mixed vigorously with 100 ml of 0.5 ammonium acetate solution. The soil and water mixture is filtered to remove the soil. The concentrations of calcium, magnesium and potassium ions are as follows: [Ca225.8 ug/ml [Mg2-3.4 ug/ml [K*] 2.2 ug/ml The concentration of Na* was below the detection limit What is the cation exchange capacity (CEC) of the soil (in units of cmol kg1)? Assume a...
help with cation exchange capactity question 16. Suppose that 1 g of dry soil is mixed...
help with cation exchange capactity question
16. Suppose that 1 g of dry soil is mixed vigorously with 100 ml of 0.5 ammonium acetate solution. The soil and water mixture is filtered to remove the soil. The concentrations of calcium, magnesium and potassium ions are as follows: [Ca225.8 ug/ml [Mg2-3.4 ug/ml [K*] 2.2 ug/ml The concentration of Na* was below the detection limit What is the cation exchange capacity (CEC) of the soil (in units of cmol kg1)? Assume a...
Soil testing laboratories usually estimate cation-exchange capacity (CEC) as the sum of Ca2", Mg, and K...
Soil testing laboratories usually estimate cation-exchange capacity (CEC) as the sum of Ca2", Mg, and K displaced during extractions with neutral, 1 N ammonium acetate (NH 0Ac), which are performed primarily to test for available K. The following data were thereby obtained for three contrasting soils, but have been reported as pounds per acre for each of the three elements, assuming the conventional weight of 2 million pounds for an acre of soil 6 inches deep. Soil A 4004 381...
The highlighted questions worked out please! Tools Window Help 80%-) Fri Mar 23 5: Problem.Set.ll.Chap.8.9.10.2018.pdf (1...
The highlighted questions worked out please!
Tools Window Help 80%-) Fri Mar 23 5: Problem.Set.ll.Chap.8.9.10.2018.pdf (1 page) -Edited v 순 Q Search 2. All exchangeable cations on a 30-g soil were displaced by NH4. Then NH4 was displaced by K* and NH4 was determined to be 60 mg in solution. Calculate the CEC (cmolokg) of the soil. The cations on an exchangeable sites of a 30 g soil were displaced by repeatedly washing by a salt and found to be...
6. A quantity of 100 g of soil has a CEC of 5 meq. How may negatively charged sites does this soil have? 7. A soil...
6. A quantity of 100 g of soil has a CEC of 5 meq. How may negatively charged sites does this soil have? 7. A soil was determined to have 12.5 meq/100 g of CEC. How many cmole/kg would this equal? 8. Convert the following concentrations into parts per million (ppm): At wts: Ca2+ = 40, H = 1, Mg2+ = 24, K = 39 9. Convert 3 cmol/kg soil Cainto parts per million (ppm).
help with cation exchange capactity question
16. Suppose that 1 g of dry soil is mixed vigorously with 100 ml of 0.5 ammonium acetate solution. The soil and water mixture is filtered to remove the soil. The concentrations of calcium, magnesium and potassium ions are as follows: [Ca225.8 ug/ml [Mg2-3.4 ug/ml [K*] 2.2 ug/ml The concentration of Na* was below the detection limit What is the cation exchange capacity (CEC) of the soil (in units of cmol kg1)? Assume a...
help with cation exchange capactity question
16. Suppose that 1 g of dry soil is mixed vigorously with 100 ml of 0.5 ammonium acetate solution. The soil and water mixture is filtered to remove the soil. The concentrations of calcium, magnesium and potassium ions are as follows: [Ca225.8 ug/ml [Mg2-3.4 ug/ml [K*] 2.2 ug/ml The concentration of Na* was below the detection limit What is the cation exchange capacity (CEC) of the soil (in units of cmol kg1)? Assume a...
Soil testing laboratories usually estimate cation-exchange capacity (CEC) as the sum of Ca2", Mg, and K displaced during extractions with neutral, 1 N ammonium acetate (NH 0Ac), which are performed primarily to test for available K. The following data were thereby obtained for three contrasting soils, but have been reported as pounds per acre for each of the three elements, assuming the conventional weight of 2 million pounds for an acre of soil 6 inches deep. Soil A 4004 381...
The highlighted questions worked out please!
Tools Window Help 80%-) Fri Mar 23 5: Problem.Set.ll.Chap.8.9.10.2018.pdf (1 page) -Edited v 순 Q Search 2. All exchangeable cations on a 30-g soil were displaced by NH4. Then NH4 was displaced by K* and NH4 was determined to be 60 mg in solution. Calculate the CEC (cmolokg) of the soil. The cations on an exchangeable sites of a 30 g soil were displaced by repeatedly washing by a salt and found to be...
6. A quantity of 100 g of soil has a CEC of 5 meq. How may negatively charged sites does this soil have? 7. A soil was determined to have 12.5 meq/100 g of CEC. How many cmole/kg would this equal? 8. Convert the following concentrations into parts per million (ppm): At wts: Ca2+ = 40, H = 1, Mg2+ = 24, K = 39 9. Convert 3 cmol/kg soil Cainto parts per million (ppm).
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