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SWS3022 Lecture 15 Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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SWS3022 Lecture 15 Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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SWS3022 Lecture 15 Exam | Questions And Answers Latest {2024- 2025} A+ Graded |100% Verified
organic chemical - also referred to as an organic compound, is defined as being constructed of
molecules that possess carbon-based atoms. Specifically, it is composed of carbon atoms attached to
hydrogen atoms, together with a variety of other elements from functional groups, such as oxygen,
nitrogen, sulfur, etc. Usually, an organic chemical is covalently bonded, meaning that electrons are
shared between atoms. This characteristic is why organic chemicals can be structured in a variety of long
chains and rings and form bonds with the great stability. Can be naturally-occurring or synthetic in
nature.
Inorganic solution constituents may contain
carbon, but are not based generally
on the carbon atom. - Metals
Chemical Nutrients
Acids
Some Inorganic Chemicals in Soil Solution - Na+, K+, Ca2+, Mg2+, Cu2+, Fe3+
Cl-, Br-, F-, I-
NO3-, CO32-, SO42-, PO4-3
Cd2+, Pb2+ Hg2+ AsO4-3
H+
Ion - Ions are stable forms of elements that acquire
an electrical charge by gaining or losing electrons
Ions are stable forms of elements that acquire
an electrical charge by gaining or losing electrons
cations - Elements that lose electrons and become
positively charged
, anions - Elements that gain electrons and become
negatively charged
Origins of Dissolved Ions in Soil Solution - Mineral Weathering
Breakdown of Organic Matter
Ions from O.M. breakdown and weathering
establish electrostatic bonds with Water.
Water molecules have the ability to orient themselves relative to the introduction of a solute. - true
Ion hydration - Orientation of Water Molecules
Hydration Sphere
The size of the hydration sphere determines the size of the ion in solution.
Interaction of Organic Chemicals with Soils is Controlled
by a Variety of Factors, Including Water Solubility, Electrical
Charge, Polarity, Soil Organic Matter Content, and Soil Electrical Properties - true
charged vs uncharged orgamic chemicals - Charged organics are generally water soluble and interact
with electrically charged components of the soil
Uncharged organics typically interact with soil organic matter to varying degrees depending principally
on water solubility
Solution reaction with the soil is dependent on the
nature of the solute and the particulates - true
The Mineral Component of Soils - Consists of both Primary and Secondary Minerals
Primary Minerals are derived from
rocks and are relatively unreactive
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