Exam (elaborations)
SWS3022 Exam 2*3 | Questions And Answers Latest {} A+ Graded | 100% Verified
- Course
- Institution
SWS3022 Exam 2*3 | Questions And Answers Latest {} A+ Graded | 100% Verified
[Show more]
Content preview
SWS3022 Exam 2*3 | Questions And Answers Latest {2024- 2025} A+ Graded | 100%Verified
What are the important soil solution constituents of inorganic soils? - can contain carbon, but are not
based on carbon; simple
- metals, chemical nutrients, acids
- all ionic
What are the important soil solution constituents of organic soils? - compounds of carbon; dominated
by C, H, and O; complex
- covalently bonded
- can be natural or synthetic
How do ions differ from the elements in the periodic table? - Elements in the periodic table are
electrically neutral. Ions are stable forms of elements that acquire an electrical charge by gaining or
losing electrons.
ions - stable forms of elements that acquire an electrical charge by gaining or losing electrons
cations - elements that lose electrons; positively charged
anions - elements that gain electrons; negatively charged
hydration sphere - when ions are surrounded by a sphere of water molecules because of the charge of
the ions and the charge of each pole of the water molecules
ion hydration - when an ionic solid dissolves in a polar solvent like water, water surrounds the ion
(hydration sphere) to form a hydrated ion
How can ion hydration impact the size of cations in a soil? - each ion has a different ability to attract
water
, smaller = larger hydration sphere = larger cation
1:1 and 2:1 aluminosilicate clay minerals are WHAT? - colloidal (small, large specific surface area, highly
reactive)
What are the 3 fundamental features of soil mineral colloids? - small, large specific surface area, highly
reactive
reactivity is derived from large surface area and electrical charge
Reactivity in soil mineral colloids is derived from what two factors? - large surface area and electrical
charge
How is cation exchange capacity measured? - Take a mineral / clay / whatever that is saturated with a
cation, then flush them out with a stronger cation. The displaced cations will be collected in a beaker,
and the number of cations, and that number is the amount of negative charges (CEC)
What are the fundamental building blocks for aluminosilicate clays and the dominant ions comprising
them? - Tetrahedral sheets (silicon and oxygen) and octahedral sheets (aluminum, oxygen, and
hydroxide).
tetrahedral sheet - one of the fundamental building blocks of aluminosilicate clays; silicon based, share
oxygen to interlock
octahedral sheet - one of the fundamental building blocks of aluminosilicate clays; aluminum based,
surrounded by six OH groups
1:1 mineral - one tetrahedral sheet and one octahedral sheet
2:1 mineral - one octahedral sheet and two tetrahedral sheets; octahedral sheet is sandwiched between
the two tetrahedral sheets
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller oneclass. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.48. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73091 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now