Worksheet: Ionic Structures

In this worksheet, we will practice describing common features of ionic lattices and linking their material properties to their chemical structures.

Q1:

In which of the following scenarios is an ionic substance conductive?

  • A When it is freshly made
  • B When it is broken into very small pieces
  • C When it contains a mixture of different ions
  • D When it is molten
  • E When it is cooled with liquid nitrogen

Q2:

Ionic structures are composed of oppositely charged ions. Why are solid ionic structures electrical insulators rather than conductors?

  • AThe regular arrangement of ions causes a reversal of the electric field, opposing the flow of ions.
  • BThe ions are stable so cannot undergo changes in charge in response to an applied electric field.
  • CEach ion is balanced by those of the opposite charge, making the structure neutral overall.
  • DThe ions are locked in place and cannot move in response to an applied electric field.
  • EThe net flow of charge is zero because ions flow in opposite directions in response to an applied electric field.

Q3:

What is the regular arrangement of ions in an ionic structure called?

  • A A giant covalent structure
  • B An amorphous solid
  • C A fluid lattice
  • DA crystal lattice
  • E A fixed solid

Q4:

Why do ionic substances produce conductive solutions when dissolved in water?

  • APositive ions are more soluble, so solutions of ionic substances have a non-zero net charge.
  • BWater destabilizes the ions, allowing their charge to increase or decrease in response to an applied electric field.
  • CPositive ions are smaller than negative ions so move more rapidly in response to an applied electric field.
  • DThe ions are free to move in response to an applied electric field.
  • ECharge is transferred via ionization reactions so can flow in response to an applied electric field.

Q5:

In which of the following scenarios is an ionic substance conductive?

  • AWhen in the gas state
  • BWhen ground into a powder
  • CWhen cooled with liquid nitrogen
  • DWhen dissolved in water
  • EWhen just below its melting point

Q6:

The forces between ions in ionic structures are generally very strong. Which physical properties would you expect to be high as a result?

  • AElasticity and flexibility
  • BConductivity and solubility
  • CColor and smell
  • DMelting and boiling points

Q7:

What force holds ionic structures together?

  • A Magnetism
  • B Gravity
  • C Covalent bonds
  • D Electrostatic attraction
  • E Metallic bonds

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