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GCSE Chemistry 2.1 Structure and Bonding > 1.3 Formulaes of Ionic Compounds > Flashcards

1.3 Formulaes of Ionic Compounds Flashcards

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1
Q

How can we work out charges in ionic compounds?

A

Balance the charges of the elements we already know as they cancel each other out

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2
Q

What does the formula of an ionic compound show?

A

The ratio of ions in a compound

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3
Q

What do the Roman numerals mean before transition metals names?

A

Their charge, eg. Iron (II) sulfate means there are 2 iron ions in the compound

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4
Q

What are carbonate ions made of?

A

Carbon and oxygen

CO3 2-

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5
Q

What are hydroxide ions made of?

A

OH- ions

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6
Q

Why do we use brackets in formulas?

A

If we need to multiply these ions to write the formula

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7
Q

What is the formula for calcium fluoride?

A

CaF2

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8
Q

What is the formula for sodium sulfate?

A

Na2SO4

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9
Q

What is the formula for magnesium nitrate?

A

Mg(NO3)2

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10
Q

What is the formula for copper (II) chloride?

A

CuCl2

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11
Q

What is the formula for iron (III) hydroxide?

A

Fe(OH)3

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12
Q

Are ionic compounds positive, neutral or negative?

A

Neutral

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13
Q

What table helps you to find reaction formulas?

A 
Element:    Potassium / Oxygen
Ion/group:       K1+      /    O2-
Electrons:    Donate 1  / accept 2 
Ratio:                  2       /      1
Formulae:               K2O
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14
Q

Name the 4 complex ions

A
  • hydroxide group
  • nitrate group
  • carbonate group
  • sulphate group
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15
Q

What is the formula of the ion for the hydroxide group?

A

OH-

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16
Q

What is the formula of the ion for nitrate group?

A

NO3-

17
Q

What is the formula of the ion for the carbonate group?

A

CO3 2-

18
Q

What is the formula of the ion for sulphate group?

A

SO4 2-

19
Q

Name the 3 properties of solid ionic compounds

A
  • fixed in a lattice
  • can vibrate but can’t move
  • does not conduct electricity
20
Q

Name the 3 properties of molten ionic compounds

A
  • high temp so can overcome the strong attractive forces between ions
  • ions are free to move around
  • does not conduct electricity
21
Q

Name the 3 properties of ionic compounds in solutions

A
  • the water molecules separate the ions from the lattice
  • ions are free to move around
  • can conduct electricity

GCSE Chemistry 2.1 Structure and Bonding (5 decks)

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