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Solid KI has the so-called aCl structure. The shortest distance between the centre of a potassium cation and the centre of an iodide anion is 353.5 pm. Calculate the length of the edge of the conventional face-centred cubic unit cell of KI. 7.07x102 pm You are correct. Your receipt no. is 159-5618 ? Previous Tries Calculate the density of solid KI. 3.53e8g/cm^3 To calculate the density you will need to deduce how many ions of each type are in the cell. Of course, since you know the chemical formula, you need only deter of the unit cell is repeated at all other vertices of the cell, and that these eight positions contribute only one atom total to the contents of the cell (i.e. 1/8th from and an atom on a face of the cell contributes only 1/2. Next you will need the volume from the cube of the edge length. Be careful with the units. Submit Answer Incorrect. Tries 1/99 Previous Tries Calculate the shortest distance (centre to centre) between two iodide anions in solid KI. Submit Answer Tries 0/99

Solid KI has the so-called aCl structure. The shortest distance between the centre of a potassium cation and the centre of an iodide anion is 353.5 pm. Calculate the length of the edge of the conventional face-centred cubic unit cell of KI. 7.07x102 pm You are correct. Your receipt no. is 159-5618 ? Previous Tries Calculate the density of solid KI. 3.53e8g/cm^3 To calculate the density you will need to deduce how many ions of each type are in the cell. Of course, since you know the chemical formula, you need only deter of the unit cell is repeated at all other vertices of the cell, and that these eight positions contribute only one atom total to the contents of the cell (i.e. 1/8th from and an atom on a face of the cell contributes only 1/2. Next you will need the volume from the cube of the edge length. Be careful with the units. Submit Answer Incorrect. Tries 1/99 Previous Tries Calculate the shortest distance (centre to centre) between two iodide anions in solid KI. Submit Answer Tries 0/99

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter9: Liquids, Solids, And Materials
Section: Chapter Questions
Problem 115QRT
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(Unit cell); FCC of potassium (yellow) and Iodide anion (blue), calculate density of the KI solid and calculate the shortest distance between two iodide anions
Solid KI has the so-called aCl structure. The shortest distance between the centre of a potassium cation and the centre of an iodide anion is 353.5 pm. Calculate the length of the edge of the conventional face-centred cubic unit cell of KI. 7.07×10² pm You are correct. Your receipt no. is 159-5618 ? Previous Tries Calculate the density of solid KI. 3.53e8g/cm^3 To calculate the density you will need to deduce how many ions of each type are in the cell. Of course, since you know the chemical formula, you need only deter of the unit cell is repeated at all other vertices of the cell, and that these eight positions contribute only one atom total to the contents of the cell (i.e. 1/8th from and an atom on a face of the cell contributes only 1/2. Next you will need the volume from the cube of the edge length. Be careful with the units. Submit Answer Incorrect. Tries 1/99 Previous Tries Calculate the shortest distance (centre to centre) between two iodide anions in solid KI. Submit Answer Tries 0/99
Transcribed Image Text:Solid KI has the so-called aCl structure. The shortest distance between the centre of a potassium cation and the centre of an iodide anion is 353.5 pm. Calculate the length of the edge of the conventional face-centred cubic unit cell of KI. 7.07×10² pm You are correct. Your receipt no. is 159-5618 ? Previous Tries Calculate the density of solid KI. 3.53e8g/cm^3 To calculate the density you will need to deduce how many ions of each type are in the cell. Of course, since you know the chemical formula, you need only deter of the unit cell is repeated at all other vertices of the cell, and that these eight positions contribute only one atom total to the contents of the cell (i.e. 1/8th from and an atom on a face of the cell contributes only 1/2. Next you will need the volume from the cube of the edge length. Be careful with the units. Submit Answer Incorrect. Tries 1/99 Previous Tries Calculate the shortest distance (centre to centre) between two iodide anions in solid KI. Submit Answer Tries 0/99
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Edge length of cube = 707pm

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