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Chemistry AS (Mr Harris) > 1.1 and 1.3 (formulae and chemical equations) > Flashcards

1.1 and 1.3 (formulae and chemical equations) Flashcards

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1
Q

what does aqueous mean?

A

dissolved in water

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2
Q

What is the difference between copper sulphide and copper sulphate?

A

copper sulphate also has oxygen

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3
Q

Define compound

A

two or more different elements that are chemically bonded in a fixed proportion

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4
Q

What oxidation state (charge) does group 1 always have?

A

+1 oxidation state

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5
Q

What oxidation state (charge) does group 2 always have?

A

+2 oxidation state

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6
Q

What oxidation state (charge) does group 0 always have?

A

0 as they don’t react so don’t form ions

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7
Q

What oxidation state (charge) does group 7 always have?

A

-1 oxidation state

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8
Q

What oxidation state (charge) do transition metals have?

A

they have different oxidation states
eg Fe(II) and Fe(III)

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9
Q

what does an oxidation agent do?

A

they will oxidise the other compound in the reaction

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10
Q

what does a reducing agent do?

A

they will reduce the other compounds in the reaction

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11
Q

what is the definition of electronegativity?

A

the ability of an element to attract a pair of electrons in a covalent bond

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12
Q

what is ionic bonding?

A

the electrons transfer from metal to non-metal

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13
Q

what is covalent bonding?

A

shared between atoms

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14
Q

what is metallic bonding?

A

delocalised electrons

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15
Q

when is the oxidation state of oxygen different?

A

in hydrogen peroxide and the xodiation state is -1

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16
Q

what is the oxidation state of flourine always?

A

always -1

17
Q

what is meant by an isotope?

A

isotopes occur when atoms of the same element have different masses (i.e same number of protons, different number of neutrons)

18
Q

How do you calculate the percentage composition calculations?

A

mass of element ÷ mass of compound x 100

19
Q

define a mole

A

a mole is the amount of a substance in grams which has the same number of particles as there are atoms

20
Q

what is abogadro’s constant?

A

6.02 x 10^23

21
Q
A

Chemistry AS (Mr Harris) (1 decks)

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