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Chemistry > Ch-2 : Measurement experimental technique > Flashcards

Ch-2 : Measurement experimental technique Flashcards

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1
Q

**

Burette apparatus use?

A

Used to find out different volumes of liquids

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2
Q

Pipette apparatus use?

A

Used to find out fixed volumes of liquids

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3
Q

measuring cylinder apparatus use?

A

Used to measure to the nearest 0.5 cm3 liquids

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4
Q

Gas syringe apparatus use?

A

Used to measure the volume of a gas. Maximum volume of 100 cm3

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5
Q

Volumetric flask apparatus use?

A

Used to measure 100cm3 liquids

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6
Q

Conical flask apparatus use?

A

Used to measure and prepare chemical solutions

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7
Q

What is a meniscus?

A

A meniscus is the curved surface formed when water or a solution is placed in a container

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8
Q

What do the methods of collecting gases depend on?

A
  • Solubility of gas in water
  • Density of gas compared to oxygen (air)
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9
Q

What are the three methods of collecting gases?

A
  1. Displacement of water
  2. Downward delivery
  3. Upward delivery
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10
Q

What is displacement of water used for?

A

Displacement of water is used for collecting gases that are insoluble or slightly soluble in water

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11
Q

Which gases can be collected using the displacement of water method?

A
  1. Carbon Dioxide
  2. Hydrogen
  3. Oxygen
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12
Q

What is downward delivery used for?

A

Downward delivery is used for collecting gases that are soluble in water and denser in air

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13
Q

Which gases can be collected using the downward delivery method?

A
  1. Chlorine
  2. Hydrogen Chloride
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14
Q

What is upward delivery used for?

A

Upward delivery is used for collecting gases that are soluble in water and less dense than air

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15
Q

Which gas can be collected by using upward delivery method?

A

Ammonia

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16
Q

How can we collect a dry sample of a gas?

A

We can collect a dry sample of a gas by passing it through a drying agent

17
Q

State the drying agents

A
  • Concentrated Sulfuric Acid
  • Quicklime (calcium oxide)
  • Fused calcium chloride
18
Q

Which gases can concentrated sulfuric acid dry?

A
  • Most gases
  • Chlorine
  • Hydrogen chloride
19
Q

Which gas can quicklime (calcium oxide) dry?

A

Ammonia

20
Q

Which gases can fused calcium chloride dry?

A

Most gases

21
Q

What is the test of hydrogen gas?

A

If we hold a lighted splint in the flow of hydrogen gas, it makes a squeaky pop sound

22
Q

What is the test of Oxygen gas?

A

Oxygen gas relights a glowing splint

23
Q

What is the test of Carbon dioxide?

A

Carbon Dioxide turns limewater milky

24
Q

What is a drying agent used for?

A

A drying agent is used to remove moisture from gases

Chemistry (5 decks)

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