Chemistry, 10.03.2020 07:39, sammizwang

Soil contains organic matter called humus. Humus is classified into humic and nonhumic materials. Humic materials are operationally divided into three main fractions:
Humic acid, fulvic acid, and humin.

Properties of Humic Materials.
Features Humic Acid Fulvic Acid Humin
Solubility in water soluble in alkaline pHs soluble at all pHs insoluble at all pHs
Aromatic content highly aromatic highly aromatic highly aromatic
Carboxylic acid content some high low
Phenolic content some some some

Humic materials
↓ HCl
soluble insoluble
↓ ↓NaOH
Fraction A soluble insoluble
↓ ↓
Fraction B Fraction C

In flowchart above, Fraction B is most likely:

a) Humic acid. b) Fulvic acid. c) Humin.

Answers: 2

Show answers

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 01:30, Slycooper5959

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

Answers: 1

continue

Chemistry, 22.06.2019 05:30, fgcherubin

What happens to the atomic radius when an elctron is lost

Answers: 1

continue

Chemistry, 22.06.2019 10:10, babyphoraaaaa

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate, m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2

Answers: 3

continue

Chemistry, 23.06.2019 00:00, sanaiajohnson56

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above

Answers: 3

continue

Do you know the correct answer?

Soil contains organic matter called humus. Humus is classified into humic and nonhumic materials. Hu...