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Chemistry > Gases and Chemical Experiments > Flashcards

Gases and Chemical Experiments Flashcards

1
Q

What is diffusion?

A

The random spreading out of particles from an area of high concentration to an area of low concentration.

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2
Q

When will a gas travel slower than another gas?

A

When it is heavier than the other gas

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3
Q

What makes a gas travel faster?

A

Temperature increase

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4
Q

What are the transitions between states of matter called (solids, liquids, gases)

A

Solid -> Liquid: Melting
Liquid -> Gas: Evaporation
Gas -> Liquid: Condensation
Liquid -> Solid: Freezing
Solid -> Gas: Sublimation
Gas -> Solid: Deposition

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5
Q
  1. What is the solubility of a solid?
  2. What is a saturated solution?
A
  1. The maximum mass of solid that dissolves in 100g of solvent at a particular temperature
  2. A saturated solution is a solution that contains the maximum mass of dissolved solid at a particular temperature.
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6
Q

What happens to the solubility as the temperature increases?

A

The higher the temperature the more mass dissolved before a saturated solution

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7
Q

What is are immiscible liquids?

A

Liquids that do not mix together

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8
Q

What separation technique is used to separate immiscible liquids?

A

A seperating funnel/ Decanting (A flask/holder with a tap at the bottom)

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9
Q

What separation technique is used to separate an insoluble solid.

A

Filtration (Filter paper)

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10
Q

What separation technique is used to separate a solute from a solution?

A

Crystallisation (Evaporation)

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11
Q

What separation technique is used to separate a liquid from a solution?

A

Simple distillation

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12
Q

What seperation technique is used to separate a liquid from a solution when they have similar boiling points?

A

Fractional distillation

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13
Q
  1. What is the tube used to cool a liquid in simple distillation called?
  2. What is the tube used to cool a liquid in fractional distillation called? What is the tube the liquid travel up called?
A
  1. A leibig condenser
  2. A condenser, A fractionating column
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14
Q

How do you calculate Rf (Chromotography)

A

Rf = Distance travelled by sample / Distance travelled by solvent

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15
Q
  1. What is the solute?
  2. What is the solvent?
  3. What is the solution?
A
  1. The thing dissolving
  2. The thing that dissolves it
  3. The solute and solvent mixture
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16
Q

What are the approximate amounts of nitrogen and oxygen in the air?

A

Nitrogen - 4/5
Oxygen - 1/5

Chemistry (4 decks)

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