Exam 23: Metals and Metallurgy

The respective standard oxidation potentials for Cu -Cu²⁺, Ni -Ni²⁺, and Ag -Ag⁺ are (in V) - 0)34, +0.28, and - 0.80. Impure copper slabs at the anode are refined electrochemically, affording much purer metallic copper at the cathode. Which statement below is true?

Metallurgical processes that utilize high temperatures are collectively called

Hydrometallurgy is

The molecular- orbital model for Ge shows it to be

An advantage to leaching gold with aqueous solutions of cyanide ion is that

If the electronic structure of a solid substance consists of a valence band that is completely filled with electrons and there is a large energy gap to the next set of orbitals, then this substance will be a(n) _ .

Steel is

Carbon monoxide is commonly used to produce free metals from their oxides. What is the coefficient of carbon monoxide in the balanced equation for the production of cobalt from Co₂O₃?

Draw a diagram of the short- hand ground state electron configuration of zinc.

The hydrated nickel(II) ion is

Roasting ZnS in the presence of oxygen produces the metal oxide and SO₂. What is the coefficient of ZnS when the equation for this reaction is completed and balanced?

What are the products of the following (unbalanced) leaching process?

Which one of the following compounds is yellow?

Most of the metals in the third transition series have about the same atomic radius as the elements above them in second transition series. This is a result of .

Anhydrous aluminum oxide is dissolved in molten cryolite rather than simply melted because __________

The oxidation state of copper in Cu₂S is .

What happens to the silicon that is a contaminant in crude iron in a converter?

Most transition metal ions contain partially occupied subshells.

What is the typical effect of the addition of an interstitial element on the properties of a metal?

The first step in the production of nickel from its ore, NiS, is to roast it in the presence of oxygen to form the metal oxide and SO₂. What is the coefficient of oxygen when the equation for this reaction is completed and balanced?