Acid and Bases Flashcards

1
Q

A chemical substance that gives hydrogen ions in aqueous solution is called

A

an acid

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2
Q

If the concentration of the hydrogen ions is high, the pH is

A

low

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3
Q

substances that identify acidity or alkalinity of substances

A

Indicators

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4
Q

substance that changes color when added to another substance

A

universal indicator

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5
Q

Acids turn

A

blue litmus red

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6
Q

Bases turn

A

red litmus blue

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7
Q

Mention some characteristics of Acid:

A

It has a sour taste
it produces hydrogen ions.
it is corrosive
pH is less than 7

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8
Q

all the molecules become ions in

A

strong acids

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9
Q

few molecules become ions in

A

weak acids

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10
Q

If more molecules of an acid are present in a given volume of solution, the acid will be

A

concentrated

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11
Q

If less molecules of an acid are present in a given volume of solution, the acid will be

A

diluted

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12
Q

acid+metal ——-

A

salt+hydrogen

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13
Q

acid+metal oxide——

A

salt+water

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14
Q

acid+alkali——-

A

salt+water

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15
Q

acid+ metal carbonate——

A

salt+water+carbon dioxide

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16
Q

Mention some characteristics of bases

A

Gives hydroxide ions
has bitter taste
slippery
soapy

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17
Q

Water soluble bases are called

18
Q

If the concentration of the hydroxide ions is high, the pH is

19
Q

when all the molecules become ions in bases

A

strong bases

20
Q

when few molecules become ions in bases

A

weak bases

21
Q

If more molecules of a base are present in a given volume of solution, the base will be

A

concentrated

22
Q

If less molecules of a base are present in a given volume of solution, the base will be

23
Q

base+acid——-

A

salt+water

24
Q

carbonate base+acid+salt——-

A

salt+water+carbon dioxide

25
base+ammonium salt--------
salt+ammonia+water
26
Acids are proton donors or proton acceptors
proton donors
27
Bases are proton donors or proton acceptors
proton acceptors
28
Strong acids have low pH because
more number of free hydrogen ions present in the solution
29
Strong acids are good or bad conductors of electricity
good
30
Strong bases have high pH because
more number of hydroxide ions present in the solution
31
Weak bases are good or bad conductors of electricity
bad
32
When an acid and a base react, what is formed
water
33
Test for ammonium gas
Turns damp red litmus paper blue
34
Test for oxygen
relights a glowing splint
35
test for hydrogen
Pops with a lighted splint
36
test for carbon dioxide
Turns limewater milky
37
test for chlorine
Bleaches damp litmus paper
38
Rainwater with a lower pH than normal is called
acid rain
39
Rainwater is slightly acidic. natural acidity of rainwater is due to
carbon dioxide in the atmosphere dissolving into the rain
40
Burning of fossil fuels in power station forms
sulfuric dioxide and nitrogen oxide
41
list any one effect of acid rain
acid rain effects rivers and lakes and they become acidic and animals can't live in them. Soil becomes acidic, so trees don't grow well
42
How can we reduce acid rain?
pollutants can be removed before they enter the atmosphere | Exhaust systems can be fitted with a catalytic convertor which turns harmful gases into harmless gases