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Science 2018 > Chemical Change > Flashcards

Chemical Change Flashcards

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1
Q

What is meant by physical change?

A

Change of state. Eg. Solid->Liquid->Gas

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2
Q

What is meant by phase change?

A

Type of change that object is making

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3
Q

What are the names of six possible phase changes?

A 
Sublimation
Evaporation
Melting
Freezing
Condensation
Deposition
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4
Q

What is a reactant?

A

Reacts with another thing to form a product.

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5
Q

What is a product?

A

The thing created by a chemical reaction.

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6
Q

What is thermal decomposition?

A

Breaking down of a chemical compound into its elements.

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7
Q

What is the general equation for combustion reactions?

A

Fuel + O2 -> CO2 + H20

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8
Q

What is rusting?

A

The metal pulls in the oxygen molecules in the air and forms a brown/black layer on the surface.

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9
Q

Formula for sulfuric acid.

A

H2SO4

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10
Q

Formula for nitric acid

A

HNO3

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11
Q

Formula for hydrochloric acid

A

HCl

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12
Q

What is the general equation for an acid reacting with a metal?

A

Metal + Acid -> Metal Salt + Hydrogen

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13
Q

How is the reactivity series ordered?

A

The lower the group and period, the more reactive.

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14
Q

What is a base?

A

The oxide or hydroxide of a metal.

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15
Q

What is an alkali?

A

A base that is soluble in water, (Usually contains OH-)

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16
Q

What is the general neutralization equation?

A

Acid + Base -> Salt + Water

17
Q

What is soluble?

A
  • All group 1 metal compounds
  • All nitrates
  • All sulphates except lead, calcium, barium or strontium.
  • All chlorides, bromides, and iodides except lead, mercury, and silver.
  • Chlorate (ClO3-), Perchlorate (ClO4-), and acetate (CH3COOH-) salts.
18
Q

What is insoluble?

A
  • All oxides and hydroxides, except group 1, or Barium, Strontium, or calcium.
  • All carbonates except those of group 1 elements, or Ammonium (NH4)
  • All compounds of lead except nitrate.
  • All sulphides are insoluble except those of group 1 or 2 elements or, Ammonium (NH4)

Science 2018 (7 decks)

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