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Chemistry > U2.1: Ionic model > Flashcards

U2.1: Ionic model Flashcards

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1
Q

Define Ionic bond

A

Electrostatic attraction between oppositely charged ions.

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2
Q

What ions have a stronger electrostatic attraction and a stronger ionic bond?

A

Ions with a greater charge have stronger electrostatic attractions and stronger ionic bonds

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3
Q

What is the relation between the radius, the charge and the ionic bond of an element?

A
  • Smaller the radius and greater the charge of ions, the stronger of ionic bonds and vice versa
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4
Q

Define melting point

A

The temperature at which a solid will undergo a change of state to a liquid

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5
Q

Define Volatility

A

The ease at which a substance vaporises or becomes a gas.

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6
Q

Define lattice enthalpy

A

A measure of the strength of the electrostatic attraction between ions in an ionic compound

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7
Q

Relation between the lattice enthalpy and ionic bond?

A
  • The larger the enthalpy, the stronger the ionic bond and vice versa
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8
Q

Define electrical conductivity

A

The ability of charged particles to move through a region of space

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9
Q

What is conductivity exclusively NOT for

A

Conductivity is not exclusively for electrons, it’s the mobility of ions too (in molten or aqueous state)

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10
Q

What does the strength of ionic bonds depend on

A

Atomic Radius
Nuclear Charge

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11
Q

What are the polyatomic ions

A
  • Sulfate
  • Sulfite
  • Nitrate
  • Nitrite
  • Carbonate
  • Hydrogen Carbonate
  • Hydroxide
  • Ammonium
  • Phosphate
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12
Q

Charge of sulfate

A

SO4 2-

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13
Q

Charge of Sulfite

A

SO3 2-

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14
Q

Charge of nitrate

A

NO3 -

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15
Q

Charge of Nitrite

A

NO2 -

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16
Q

Charge of Carbonate

A

CO3 2-

17
Q

Charge of Hydrogen Carbonate

A

HCO3 -

18
Q

Charge of Hydroxide

A

OH -

19
Q

Charge of Ammonium

A

NH4 +

20
Q

Charge of Phosphate

A

PO4 3-

21
Q

Order of energy required to breakl the bonds in all tyopes of bonds?

A

Covalent < metallic < ionic

22
Q

Explain why the bonding of HCl is less than that of LiCl

A
  • LiCl has ionic bonding whereas HCl has polar, covalent bonding
  • The electrostatic forces of attraction in Ionic bonds are much stronger than the Intermolecular forces of attraction in polar covalent bonds.
23
Q

Which, out of CaO and CaF2, will have a higher melting point

A
  • CaO
  • O has a greater charge than Fluorine meaning there’s a stronger ionic bond in CaO than CaF2 hence a greater magnitude of enthalpy charge
24
Q

When ions lose electrons what do they gain

A

A positive charge (or forming cations)

And vice versa

Chemistry (18 decks)

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