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Chemistry > Chemical Reactions and Equations > Flashcards

Chemical Reactions and Equations Flashcards

1
Q

Calcium oxide and water

A

CaO + H2O&raquo_space; Ca(OH)2

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2
Q

Calcium Carbonate is heated

A

CaCO3&raquo_space; CO2 + CaO

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3
Q

Calcium Hydroxide and Carbon Dioxide

A

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

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4
Q

Methyl Alcohol

A

CH3OH

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5
Q

Potassium Chlorate

A

KClO

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6
Q

Magnesium + Oxygen

A

2Mg + O2&raquo_space; 2MgO

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7
Q

Sulphuric Acid

A

H2SO4

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8
Q

Zinc + Sulphuric Acid

A

Zn + H2SO4&raquo_space; ZnSO4 + H2

zinc sulphate

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9
Q

Iron(4) + Water

A

3 Fe + 4 H2O&raquo_space; Fe3O4 + 4 H2

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10
Q

CaO + H2O

A

Ca(OH)2 + Heat

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11
Q

Quick lime

A

CaO (s)

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12
Q

Slaked Lime

A

Ca(OH)2 (aq)

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13
Q

Observations when we add water to quick lime

A

Rise in the temperature, formation of bubbles

Formation of white ppt [Ca(OH)2 or slaked lime]

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14
Q

Burning of coal

A

C + O2&raquo_space; CO2

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15
Q

Formation of water

A

O2 + 2H2&raquo_space; 2H2O

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16
Q

Burning of gas (Methane)

A

CH4 + 2O2&raquo_space; CO2 + 2H2O

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17
Q

Is respiration exothermic

A

Yes, it releases energy from food molecules

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18
Q

3 examples of exothermic reactions

A
  1. Burning of natural gas
  2. Respiration
  3. Decomposition
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19
Q

Ferrous Sulphate is heated

A

2FeSO4&raquo_space; Fe2O3 + SO2 + SO3

Ferric oxide
Sulphur Dioxide/Trioxide

20
Q

Ferrous Sulphate Crystals are heated

eqn + obs

A

FeSO4.7H2O&raquo_space; FeSO4

light green to white

Anhydrous Ferrous Sulphate

21
Q

Ferrous Sulphate is heated observations

A

reddish brown solid is left out (Fe2O3)

smell of a gas having the odour of burning sulphur

22
Q

Lime Stone

A

CaCO3

23
Q

Calcium carbonate is heated

A

CaCO3&raquo_space; CO2 + CaO

24
Q

Quick Lime uses

A

CaO

white washing

manufacturing of cement, paper
preparing bleaching powder

25
Q

calcium hydroxide uses

A

sewage treatment,
paper production,
food processing.

26
Q

Lead nitrate is heated

A

2Pb(NO3)2&raquo_space; O2 + 4NO2 + 2PbO

nitrogen dioxide
lead oxide

27
Q

Silver Chloride in sun

A

2AgCl&raquo_space; Cl2 + 2Ag

28
Q

Silver Bromide in sun

A

2AgBr&raquo_space; Br2 + 2Ag

29
Q

Silver bromide and chloride are used for

A

bnw photography

30
Q

Barium Hydroxide and Ammonium chloride

A

Ba(OH)2 + 2NH4Cl&raquo_space; BaCl2 + 2NH3 + 2H2O

endothermic

31
Q

Electrolysis

A

Process of decomposing ionic compounds into their elements by passing a direct electric current through the compound in a fluid form

32
Q

In electrolysis of water, which gas is formed where

A

oxygen at the anode
hydrogen at the cathode

33
Q

Iron and copper sulphate

A

Fe + CuSO4&raquo_space; FeSO4 + Cu

34
Q

Iron and Copper sulphate: observations

A

Iron nail has red coating (Cu deposit)

Blue CuSO4 becomes green (FeSO4)

35
Q

Zinc + copper sulphate

A

Zn + CuSO4&raquo_space; ZnSO4 + Cu

36
Q

Lead and copper chloride

A

Pb + CuCl2&raquo_space; PbCl2 + Cu

37
Q

sodium sulphate and barium chloride

A

Na2SO4 + BaCl2&raquo_space; 2NaCl + BaSO4

38
Q

sodium sulphate and barium chloride obs

A

white ppt is formed (BaSO4)

39
Q

Copper and oxygen

eqn obs

A

Black substance on copper powder
Copper Oxide (CuO)

2Cu + O2&raquo_space; 2CuO

40
Q

Copper oxide and hydrogen
eqn obs

A

CuO + H2&raquo_space; Cu + H2O

black turns brown (Cu)

41
Q

Redox

A

A reaction where one reactant gets oxidised, the other gets reduced simultaneously

42
Q

Zinc oxide and carbon

A

ZnO + C&raquo_space; CO + Zn

43
Q

Manganese dioxide and Hydrochloric acid

A

MnO2 + 4HCl&raquo_space; MnCl2 + Cl2 + 2H2O

44
Q

Potassium iodide + Lead nitrate

A

2KI + Pb(NO3)2&raquo_space; PbI2 + 2KNO3

45
Q

Potassium iodide + Lead nitrate obs

A

yellow ppt is formed (lead iodide)

46
Q

example of endothermic reaction

A

Ba(OH)2 + 2NH4Cl&raquo_space; BaCl2 + 2NH3 + 2H2O

Chemistry (5 decks)

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