Strontium (Sr) is a naturally occurring element that is used by geologists to determine the… 1 answer below »

Questions:

1. For each of the following minerals: (1) describe (or diagram) the structure and provide a

chemical formula; (2) indicate the locations on the mineral surface where ions may be

adsorbed; and (3) identify the characteristic of the mineral that results in surface charge (i.e.,

how surface charge develops and where it is located).

a. Vermiculite

b. Gibbsite

c. Birnessite

d. Quartz

2. Develop definitions for the following:

a. Natural organic matter

b. Humic acids

c. Fulvic acids

d. Humin

For each definition, also include how each would compare in terms of polyfunctionality (e.g.,

hydrophobic versus hydrophilic functional groups) and elemental content.

3. Strontium (Sr) is a naturally occurring element that is used by geologists to determine the

origins of sedimentary rock and also as a tracer for groundwater-surface water hydrology.

Mineralized strontium is usually in the form of either strontianite (SrCO3(s)) or celestite

(SrSO4(s)).

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