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---Chemistry--- by me:) Yr8 > compoundss, acidss and alkalis > Flashcards

compoundss, acidss and alkalis Flashcards

chemical reactionss, acids and alkalis

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1
Q

complete the equation

magnesium+oxygen–>

A

magnesium oxide

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2
Q

complete the equation

zinc+oxygen–>

A

zinc oxide

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3
Q

complete the equation

carbon+oxygen–>

A

carbon dioxide

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4
Q

complete the equation

sulfur+oxygen–>

A

sulfur dioxide

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5
Q

what pH do metal oxides have

A

they always have a pH greater than 7

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6
Q

what pH do non-metals have

A

their pH will always be less than 7

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7
Q

what colour do alkaline substances go in universal indicator

A

purple or blue

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8
Q

what colour do acidic substances turn in universal indicator

A

yellow, orange or red

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9
Q

is alkaline metals or non-metals

A

metal

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10
Q

is acidic non-metal or metal

A

non-metal

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11
Q

what is the equation of the neutralisation reaction

A

metal oxide+acid–> salt+water

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12
Q

what is a base

A

a base is a substance that has a pH above 7 that is insoluble in water.

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13
Q

give an example of a base

A

magnesium oxide

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14
Q

describe ethonic acid( vinegar )

A

pH= orange, 3 or 4
acid
weak

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15
Q

describe citric acid( lemon juice )

A

pH= orange, 3 or 4
acid
weak

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16
Q

describe hydrochloric acid

A

pH=red, 2
acid
strong

17
Q

describe sulfric acid

A

pH= orange, 2
acid
strong

18
Q

describe ammonium hydroxide

A

pH= purple, 12
alkali
strong

19
Q

describe sodium hydroxide

A

pH=purple, 12
alkali
strong

20
Q

why do acids turn red, orange with universal indicator

A

because they all contain hydrogen ions H+, these are also known as proton donors

21
Q

why do alkalis turn purple with universal indicator

A

because they contain hydroxide ions

OH-

22
Q

what happens when an acid and alkali dissolves in water

A

when an acid or an alkali dissolve in water to make an aqueous(water) solution, they dissociate. This means that it was bonded to.

23
Q

give one example of dissociation

A

HCI–>H+ and CI-

an acid equation

24
Q

give another example of dissociation

A

NaOH–>Na+ and OH

alkali equation

25
Q

how do u make water from an acid and alkali

A

H+ and OH- —> H2O

ion ion water

26
Q

finish the equation

HCI+KOH—>

A

H2O+KCI

---Chemistry--- by me:) Yr8 (6 decks)

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