draw the unit cell of a lead sulfide , in which there are sulfide anions in...

draw the unit cell of a lead sulfide , in which there are sulfide anions in a face centered cubic lattice , and lead cations are in alternate tetrahedral holes. Derive the stoichiometry of the mineral and the charge of the lead cation.

Expert Solution

In FCC, there is 1 aton at each of the 8 corners of the unit cell shared by 8 surrounding unit cells and 1 atom at each of the 6 faces shared by 2 surrounding unit cells.

Hence number of sulfide (S^2-) anions per unit cell = 8 x (1/8) + 6 x (1/2) = 4 S^2- anions.

In FCC there are a total of 8 tetrahedral holes per unit cell.

Since lead cations occupy alternate tetrahedral holes, number of lead cations per unit cell = 8/2 = 4 Pb cation.

Since there are equal number of cations and anions, the charge on both the cations and anions are same.

Hence charge of lead cation = +2 (answer)

Stoichiometry of the mineral = Pb4S4 or PbS (answer)

For structure take a 3d figure for the structure of PbS from internet.

queen_honey_blossom answered 2 years ago

We can precipitate lead with many anions, including sulfide and sulfate (among others). Using the two...

We can precipitate lead with many anions, including sulfide and sulfate (among others). Using the two equilibrium relationships below, the treatment target (based on the ‘action level’) of ~7x10-8 M, and the associated costs of the salts, which would you select (ignoring all other considerations, which are many, but looking at cost alone) to remove lead from 100 m3 of solution with lead at 2x10-5 M? In each case you will have to determine the amount of anion (sulfide or...

lead (2) sulfide is the principle source of lead metal. to obtain the metal, the sulfide...

lead (2) sulfide is the principle source of lead metal. to obtain the metal, the sulfide is first heated in air to produce pbo.

The element lead (Pb) crystallizes with a Face Centered Cubic unit cell. The density of lead...

The element lead (Pb) crystallizes with a Face Centered Cubic unit cell. The density of lead is 11.3 g/cm3. Use this information to calculate the theoretical metallic radius of a lead atom in picometers. 1 pm = 1×10−12 meters [Note: The theoretical value for the metallic radius may be different from the experimentally determined value. Simply Googling the value of atomic radius may not yield the correct result]

draw the unit cell of ReO3,in which is composed of a primitive lattice of rhenium(open cirlces)...

draw the unit cell of ReO3,in which is composed of a primitive lattice of rhenium(open cirlces) with oxides in all edge octahedral holes. verify the stoichiometry of the ionic solid.

17. A. The molar solubility of lead sulfide in a 0.219 M lead nitrate solution is...

17. A. The molar solubility of lead sulfide in a 0.219 M lead nitrate solution is _____M. B. The maximum amount of calcium carbonate that will dissolve in a 0.195M potassium carbonate solution is _____M. C. The molar solubility of barium carbonate in a 0.132 M potassium carbonate solution is _____M.

A cell membrane at 37°C is found to be permeable to Ca2+ but not to anions,...

A cell membrane at 37°C is found to be permeable to Ca2+ but not to anions, and analysis shows the inside concentration to be 0.100 M and the outside concentration to be 0.001 M in Ca2+. a) What potential difference in volts would have to exist across the membrane for Ca2+ to be in equilibrium at the stated concentrations? Assume that activity coefficients are equal to 1. Give the sign of the potential inside with respect to the outside. b)...

Roasting galena [lead(II) sulfide] is an early step in the industrial isolation of lead. How many...

Roasting galena [lead(II) sulfide] is an early step in the industrial isolation of lead. How many liters of sulfur dioxide, measured at STP, are produced by the reaction of 4.77 kg of galena with 125 L of oxygen gas at 220°C and 2.00 atm? Lead(II) oxide also forms.

When solid lead(II) sulfide reacts with oxygen gas, the products are solid lead(II) oxide and sulfur...

When solid lead(II) sulfide reacts with oxygen gas, the products are solid lead(II) oxide and sulfur dioxide gas. PART A: How many grams of oxygen are required to react with 32.2 g of lead(II) sulfide? Express your answer using three significant figures. PART B: How many grams of sulfur dioxide can be produced when 60.0 g of lead(II) sulfide reacts? Express your answer using three significant figures. PART C: How many grams of lead(II) sulfide are used to produce 134...

1. When solid lead(II) sulfide ore burns in oxygen gas, the products are solid lead(II) oxide...

1. When solid lead(II) sulfide ore burns in oxygen gas, the products are solid lead(II) oxide and sulfur dioxide gas 2PbS(s)+3O2(g)→2PbO(s)+2SO2(g) A.How many grams of oxygen are required to react with 26.0 g of lead(II) sulfide? B.How many grams of sulfur dioxide can be produced when 61.0 g of lead(II) sulfide reacts? C.How many grams of lead(II) sulfide are used to produce 121 g of lead(II) oxide? 2. Pentane gas, C5H12, undergoes combustion with oxygen to produce carbon dioxide and...

Draw the Lewis structure of Ne, C, and K? Do anions gain or lose electrons? Do...

Draw the Lewis structure of Ne, C, and K? Do anions gain or lose electrons? Do cations gain or lose electrons? Draw the Lewis structure for Na+, Ca2+, O2- and Cl-. Draw the Lewis structures for the ionic compounds below: Na2S CaCl2,,,,Mg3N2

Question