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Science > Chemistry > Flashcards

Chemistry Flashcards

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1
Q

ionic bonds vs molecular bonds which are stronger

A

molecular

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2
Q

how are ionic bonds formed

A

metal and non-metal

borrowing of electrons, metal and non-metal

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3
Q

give an example of an ionic compound

A

NaCl (table salt)

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4
Q

how are molecular bonds formed

A

non-metal and non-metal

sharing electrons

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5
Q

what is the law of conservation of mass

A

law of conservation of mass states that the mass of the reactants and products must be same

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6
Q

difference between acids and bases

A

acids are ph less than 7
bases ph more than 7
acids sour and bases bitter

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7
Q

what do acids always have

A

hydrogen

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8
Q

what do bases always have

A

hydroxide

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9
Q

what is an alkali

A

Its a base that dissolves in water

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10
Q

what is an alkaline solution

A

water with an alkali dissolved in it

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11
Q

acid + base

A

neutralisation reaction

salt and water

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12
Q

acid + metal

A

metal salt + hydrogen gas

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13
Q

acid + carbonate

A

salt + carbon dioxide + water

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14
Q

acid + metal carbonate?

A

same as acid + carbonate but the salt is a metal salt

metal salt, carbon dioxide and water

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15
Q

single displacement reaction

A

ab + c => ac + b

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16
Q

double displacement reaction

A

ab + cd => ad + cb (metals stay cation and cation cannot mix)

17
Q

corrosion reaction?

A

metal + oxygen = metal oxide

18
Q

decomp reaction?

A

ab => a + b

19
Q

synthesis reaction?

A

a + b => ab

20
Q

is a synthesis reaction exothermic or endothermic

A

exothermic

21
Q

is a decomposition reaction exothermic or endothermic

A

endothermic

22
Q

how is a precipitation reaction formed

A

displacement reaction forms insoluble salt

23
Q

hydrocarbon burnt in unlimited air?

A

water + carbon dioxide

24
Q

hydrocarbon burn in limited air?

A

water + carbon monoxide

25
Q

what is a fuel?

A

substance that undergoes chemical reactions to produce large amount of useful energy at a controllable rate

26
Q

uses of acids and bases

A

HCl in digestion, bases in cleaning (ammonia)

Science (7 decks)

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