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bases Flashcards

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1
Q

def base

A

a substance that reacts with an acid to produce salt and water only

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2
Q

soluble bases are called

A

alkalis

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3
Q

metal oxide (basic oxides) + H2O ->

A

hydroxides

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4
Q

2 bases that are not hydroxides or oxides

A

1) sodium hydrogen carbonate

2) ammonia

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5
Q

true or false: all hydroxides are soluble

A

false

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6
Q

insoluble bases ( 4 of them )

A

MgO-magnesium oxide
CuO- copper (II) oxide
Fe(OH)2- iron (II) hydroxide
Al(OH)3- aluminum hydroxide

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7
Q

soluble bases (4 of them)

A

LiOH- lithium hydroxide
Ca(OH)2- calcium hydroxide
Ba(OH)2- barium hydroxide
NH3(aq)- aq ammonia

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8
Q

ionic eqn of neutralization reaction:

A

H+ + OH- ->H2O

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9
Q

word eqn of neutralization reaction

A

acid + base -> salt + water ONLY

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10
Q

def alkali

A

substance that produces hydroxide ions when dissolved in water

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11
Q

alkali + ammonium compounds (e.g ammonium salts)

A

salt + water + ammonia gas

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12
Q

alkali + solns of metal ions

A

metal hydroxide precipitate

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13
Q

strong alkalis

A

completely ionizes in water to form OH- ions

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14
Q

weak alkalis

A

only a small amount of alkali molecules react with water to form OH- ions, most of the alkali molecules remain unchanged

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15
Q

true or false : the higher the pH, the stronger the alkali. however, the conc of OH- ions do not change

A

false: conc of ions directly affects the pH

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16
Q

def oxide

A

compound of oxygen and another element

17
Q

acidic oxide formed by:

A

oxides of non metals

18
Q

examples of acidic oxides :

A

so2, so3, co2, no2

19
Q

acidic oxide + water

A

acid

20
Q

acidic oxide + alkali

A

salt + water

21
Q

basic oxides ( bases ) formed by

A

oxides of metals

22
Q

examples of basic oxides

A

MgO,CuO. CaO

23
Q

basic oxide + water

A

alkali

24
Q

basic oxide + acid

A

salt + water

25
Q

amphoteric oxides formed by oxides of

A

some metals

26
Q

examples of amphoteric oxides

A

ZAP ( zinc oxide, aluminum oxide, lead (II) oxide )

27
Q

true or false: amphoteric oxides can react with both bases and acids to form salt + water

A

true

28
Q

neutral oxides formed by oxides of

A

some non metals

29
Q

examples of neutral oxides

A

CO, NO, H2O

30
Q

true or false: neutral oxides are soluble in water

A

false

31
Q

true or false: neutral oxides only react with hydroxides

A

false: neutral oxides react with neither bases or acids

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