method of preparing a representative metal using a reducing agent

electrochemical cell used for the commercial preparation of metallic sodium (and chlorine) from molten sodium chloride

electrolysis apparatus used to isolate pure aluminum metal from a solution of alumina in molten cryolite

chemical reduction process used to produce magnesium through the thermal reaction of magnesium oxide with silicon

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Chemistry 2e · 18.2 Occurrence and Preparation of the Representative Metals

Occurrence and Preparation of the Representative Metals: practice problems

7 problems from the book, with its answers. Check your working, or have any of them explained to you on the whiteboard.

Exercises 15
Write an equation for the reduction of cesium chloride by elemental calcium at high temperature.
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Exercises 17
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.
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Exercises 19
What mass, in grams, of hydrogen gas forms during the complete reaction of 10.01 g of calcium with water?
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Exercises 21
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?
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Exercises 23
Describe the production of metallic aluminum by electrolytic reduction.
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Exercises 25
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?
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Exercises 27
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?
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Key terms · 4

chemical reduction: method of preparing a representative metal using a reducing agent
Downs cell: electrochemical cell used for the commercial preparation of metallic sodium (and chlorine) from molten sodium chloride
Hall–Héroult cell: electrolysis apparatus used to isolate pure aluminum metal from a solution of alumina in molten cryolite
Pidgeon process: chemical reduction process used to produce magnesium through the thermal reaction of magnesium oxide with silicon

Learn 18.2 on the whiteboard

The tutor teaches the whole section, drawing it out step by step and answering your questions as you go.

Read 18.2 in the textbook · This section on openstax.org

Occurrence and Preparation of the Representative Metals: practice problems

7 problems from the book, with its answers. Check your working, or have any of them explained to you on the whiteboard.

Exercises 15

Write an equation for the reduction of cesium chloride by elemental calcium at high temperature.

Exercises 17

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.

Exercises 19

What mass, in grams, of hydrogen gas forms during the complete reaction of 10.01 g of calcium with water?

Exercises 21

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?

Exercises 23

Describe the production of metallic aluminum by electrolytic reduction.

Exercises 25

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?

Exercises 27

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?

Key terms · 4

chemical reduction: method of preparing a representative metal using a reducing agent
Downs cell: electrochemical cell used for the commercial preparation of metallic sodium (and chlorine) from molten sodium chloride
Hall–Héroult cell: electrolysis apparatus used to isolate pure aluminum metal from a solution of alumina in molten cryolite
Pidgeon process: chemical reduction process used to produce magnesium through the thermal reaction of magnesium oxide with silicon

Learn 18.2 on the whiteboard

The tutor teaches the whole section, drawing it out step by step and answering your questions as you go.

Read 18.2 in the textbook · This section on openstax.org