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Chemistry > Acids, Bases and Salts > Flashcards

Acids, Bases and Salts Flashcards

1
Q

Acid + Metal

A

Salt + H2

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2
Q

Base + Metal

A

Salt + H2

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3
Q

Acid + metalHCO3

A

Salt + CO2 + H2O

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4
Q

Acid + metalCO3

A

Salt + CO2 + H2O

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5
Q

Base + Acid

A

Salt + Water

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6
Q

Metal Oxide + Acid

A

Salt + Water

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7
Q

Non-metal oxide + base

A

Salt + Water

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8
Q

Acids and bases: taste

A

A: sour, lemon
B: bitter, soap/baking soda

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9
Q

Why does a stain of curry turn reddish brown when soap touches it

A

Curry contains turmeric which is a natural indicator
Soap is basic

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10
Q

Litmus is extracted from? Original colour

A

lichen, purple

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11
Q

Natural indicators examples

A

Turmeric, red cabbage leaves, petals of petunia

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12
Q

Acetic acid

A

CH3COOH

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13
Q

Phenolphthalein

A

A: no change (colourless)
B: pink

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14
Q

Methyl Orange Solution

A

A: red
B: yellow

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15
Q

Olfactory indicators

A

Onion, clove oil, vanilla: loses smell w base

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16
Q

Sodium Hydroxide and zinc

A

2NaOH + Zn&raquo_space; H2 + Na2ZnO2 (sodium zincate)

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17
Q

Sodium Carbonate and Hydrochloric acid

A

Na2CO3 + 2HCl&raquo_space; CO2 + H2O + 2NaCl

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18
Q

Sodium bicarbonate and hydrochloric acid

A

NaHCO3 + HCL&raquo_space; H2O + CO2 + NaCl

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19
Q

Calcium carbonate + water + carbon dioxide

A

CaCO3 + H2O + CO2&raquo_space; Ca(HCO3)2

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20
Q

Different forms of CaCO3

A

limestrone, marble, chalk

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21
Q

Sodium Hydroxide and hydrochloric acid

A

NaOH + HCl&raquo_space; H2O + NaCl

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22
Q

Copper oxide and HCl observations

A

blue-green solution is formed (CuCl2)

CuO + 2HCl&raquo_space; CuCl2 + H2O

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23
Q

Metallic oxides and non metallic oxides

A

basic (CuO)
Acidic (CO2)

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24
Q

what do all acids and bases have in common

A

Both acid and base conduct electricity as they produce H + and OH - ions respectively. Thus, both acid and base acts as an electrolyte.

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25
Q

Hydronium ion

A

H3O+

H2O + H+

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26
Q

Formic Acid
Acetic Acid
Phosphoric Acid

A

HCOOH
CH3COOH
H3PO4

27
Q

Weak/strong: H2SO3 name

A

Weak
Sulfurous

28
Q

Weak/strong:HNO2

A

Weak
nitrous

29
Q

Weak/strong:H3PO4

A

Phosphoric acid
weak

30
Q

Weak/strong:CH3COOH. HCOOH

A

weak
acetic
formic

31
Q

Weak/strong:HNO3

A

nitric
strongs

32
Q

Weak/strong:HCl

33
Q

Weak/strong:NH3

34
Q

Weak/strong:NaOH

A

strong base

35
Q

Weak/strong:H2CO3

36
Q

Weak/strong:Ca(OH)2

A

strong base

37
Q

Weak/strong:KOH

A

Strong base

38
Q

Mg(NO3)2

a/b?

39
Q

NaCl

40
Q

CaCO3
a/b? salt

41
Q

KNO3

42
Q

CH3COONa

43
Q

Our body works within pH range ___
acid rain pH

A

7.0-7.8

<5.6

44
Q

Antacids

A

Milk of Magnesia (Mg(OH)2)
remedy indigestion

45
Q

Tooth decay pH

46
Q

Bee sting remedy
Nettle leaves/ant inject__
sour milk acid
lemon/orange acid
vinegar
tamarind
tomato

A

mild base like baking soda (sodium bicarbonate)

methanoic acid

lactic

citric

acetic

tartaric

oxaltic

47
Q

Bleaching Powder

48
Q

Brine electrolysis equation

A

2NaCl + 2H2O&raquo_space; 2NaOH + Cl2 + H2

49
Q

which electrodes are NaOHH2 and Cl2 produced in

A

H2: Cathode
Cl2: anode
NaOH: near cathode

50
Q

H2 use

A

Fuels, ammonia for fertilizers, margarine

51
Q

Cl2 use

A

CFCs, Swimming pools, water treatment

52
Q

NaOH use

A

de-greasing metals, soaps and detergents, paper making

53
Q

Bleaching powder
formation colour

A

CaOCl2
slaked lime and chlorine: Ca(OH)2 + Cl2&raquo_space; H2O + CaOCl2

yellowish white

54
Q

Bleaching poweder use

A

kill germs in water
bleaching paper/textiles/wood
oxidising agent in industries

55
Q

Baking Soda formation

A

NaHCO3

NaCl + NH3 + H2O + CO2&raquo_space; NaHCO3 + NH4Cl

ammonium chloride
sodium bicarbonate

56
Q

Baking soda use

A

Baking powder: NaHCO3 + H+&raquo_space; CO2 + H2O + salt

antacid ingredient

soda acid fire extinguishers

57
Q

Heating baking soda

A

2NaHCO3&raquo_space;heat» Na2CO3 + H2O + CO2

58
Q

Washing soda formation

A

recrystallisation of sodium carbonate

Na2CO3 + 10H2O&raquo_space; Na2CO3.10H2O

59
Q

washing soda use

A

glass,soap paper

cleaning agent

permanent hardness of water

borax, sodium compounds

60
Q

CuSO4 after heating

eqn + obs

A

blue > white
CuSO4.5H2O&raquo_space; CuSO4 + 5H2O

61
Q

Plaster of paris formation

A

CaSO4.2H2O&raquo_space;heat» CaSO4.1/2H2O

gypsum

62
Q

POP use

A

making toys
decoration
supporting fractured bones

63
Q

Marble + acid rain

A

CaCO3 + H2SO4&raquo_space; CaSO4 + H2O + CO2

sulphuric acid

Chemistry (5 decks)

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