XIV. Magnesite

Question 1

a natural form of magnesium carbonate with ideal magnesia content of 47.60%

Answer 1

Magnesite

Question 2

What elements are typically enriched in the residual soils formed from the weathering of ultramafic rocks under favorable conditions, and which major constituents are almost completely removed?

Answer 2

the major constituents MgO and SiO₂ are almost completely removed. The residual soils become enriched in iron (Fe), nickel (Ni), alumina (Al₂O₃), and to a lesser extent, manganese (Mn) and cobalt (Co).

Question 3

Another potential source of MgO and CO2 is _________, which contains about 0.13% or about 3.90% of the total salts in the ocean and 34 to 56 ml/liter of CO2 as dissolved gases.

Answer 3

seawater