Fe and al oxides - Study guides, Class notes & Summaries

SWS3022 Exam Questions and Answers All Correct What happens to phosphorus when the soil is basic (high pH)? - Answer-- insoluble solids are formed (Calcium phosphates) - Ca + HPO4 = CaHPO4 - CaHPO4 will crystallize overtime and become highly insoluble What pH is preferred for plant availability/solubility? - Answer-6.5 What are the four types of phosphorus immobilization? - Answer-- low pH (Fe and Al phosphate solids) - high pH (Ca phosphate) - fixation in crystalline Fe and Al oxi...

A soil with 25% _____ and 25% ______by volume is close to ideal -water; organic matter -Air; mineral matter -Air; water -Mineral matter; organic matter correct answer: Air; water Soil is a dynamic natural body having properties due to the combined effects of _______ and biota as modified by ________ acting on parent material over time. -climate; topography -Time; Weather -Topography; parent material -Biota; climate -Weather; topography correct answer: climate; topography A soil ...

SCSC 301 exams 1,2,3,4 latest update graded A+ A soil with 25% _____ and 25% ______by volume is close to ideal -water; organic matter -Air; mineral matter -Air; water -Mineral matter; organic matter Air; water Soil is a dynamic natural body having properties due to the combined effects of _______ and biota as modified by ________ acting on parent material over time. -climate; topography -Time; Weather -Topography; parent material -Biota; climate -Weather; topography climate; topography A ...

Smectite and vermiculite are - Answer-made up of layers consisting of 2 tetrahedral sheets and 1 octahedral sheet The interlayer of mica is dominated by - Answer-K+ ions Isomorphic substitution refers to Ion substitution of a(n) - Answer-cation for another with a different charge, but similar size pH-dependent, or variable charged, colloids - Answer-can result from protonation and deprotonation at colloid edges The colloid type exhibiting the lowest cation exchange capacity in soils ...

Ability of soil to sorb and hold onto cations long enough for plant uptake - Ans CEC Fraction of soil that develops slight negative charge (clay and OM) - Ans Colloidal Isomorphic substitution is seen only in... - Ans Clay Isomorphic substitution is the result of... - Ans Weathering Isomorphic substitution creates a {permanent/temporary} change - Ans Permanent _____ ___________ is defined a the negative charge in perimeter oxygen atoms in Fe/Al oxides - Ans Edge charge

What is mineral formation? -:- When aluminosilicates dervive charge from substitution of lower-charged cations for higher charged cations in the crystal matrix What charge results from mineral formation? -:- permanent negative charge What substitution happens during mineral formation? -:- - Al3+ for Si4+ - Mg2+ for Al3+ What do charges on silicate crystal edges and on Al/Fe oxides depend on? -:- protonation and deprotonation (results in variable, pH-dependent charge What do organi...

Edexcel iGCSE Chemistry, question and answer with rated solution Experiment for Diffusion? 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over the time, the colour le...

1 CRSS/ FANR 3060 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ soil Correct Answer: -layer(s) of generally loose mineral and/or organic material -affected by physical, chemical, & biological processes -usually hold liquids, gases and biota and support plants -non-renewable resource soil functions Correct Answer: anchorage for plants storage and recycling of nutrients regulate water supply habitat for many organisms engineering medium 2 transformations C...

SWS3022 Soil Taxonomy Study Guide with Complete Solutions What are the Soil Master Horizons? - Answer️️ -O A E B C R The O MASTER HORIZON - Answer️️ -Greater than 20% OM Organic horizon formed above the mineral soil. Derived from decomposition of plant and animal residues Range in thickness from absent to meters thick. The A MASTER HORIZON - Answer️️ -Topmost MINERAL horizon (topsoil) Subject to significant weathering Zone of gas and water exchange High in plant roots,...

The 5 chemical properties of matter - Answer-reactivity, combustibility, valence, combining requirements, stability The atomic mass is equal to the sum of the... - Answer-protons and neutrons Hydrogen has no... - Answer-neutrons The outer orbit (last shell) requires how many valence electrons? - Answer-8 The 1st shell must have how many electrons to be complete? - Answer-2 Positively charged ions - Answer-cations Negatively charged ions - Answer-anions Metals produce what type of ions? -...