18.2 Occurrence and Preparation of the Representative Metals
Natural ores of the alkali, alkaline earth, and aluminum families, and the electrolytic and chemical reduction routes that free the metal from them.
Chemistry 2e, 18.2 Occurrence and Preparation of the Representative Metals
7 exercises
18.2 Exercise 1
Write an equation for the reduction of cesium chloride by elemental calcium at high temperature.
18.2 Exercise 3
Give balanced equations for the overall reaction in the electrolysis of molten lithium chloride and for the reactions occurring at the electrodes. You may wish to review the chapter on electrochemistry for relevant examples.
18.2 Exercise 5
What mass, in grams, of hydrogen gas forms during the complete reaction of 10.01 g of calcium with water?
18.2 Exercise 7
Magnesium is an active metal; it burns in the form of powder, ribbons, and filaments to provide flashes of brilliant light. Why is it possible to use magnesium in construction?
18.2 Exercise 9
Describe the production of metallic aluminum by electrolytic reduction.
18.2 Exercise 11
A chemist dissolves a 1.497-g sample of a type of metal (an alloy of Sn, Pb, Sb, and Cu) in nitric acid, and metastannic acid, H2SnO3, is precipitated. She heats the precipitate to drive off the water, which leaves 0.4909 g of tin(IV) oxide. What was the percentage of tin in the original sample?
18.2 Exercise 13
What mass of magnesium forms when 100,000 A is passed through a MgCl2 melt for 1.00 h if the yield of magnesium is 85% of the theoretical yield?
Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.