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IB Chemistry > Stoichiometry and the Mole > Flashcards

Stoichiometry and the Mole Flashcards

1
Q

What is an Experimental Error?

A

The Experimental error is the uncertainty obtained in a measurement

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2
Q

What are Systematic Errors?

A

Systematic errors arise from flaws in equipment or investigation design.

Reproducible with precision

Can be identified and corrected

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3
Q

Examples of Systematic Errors?

A

Typical causes of systematic error include
Observational error

Imperfect instrument calibration

Environmental interference.

Forgetting to tare or zero a balance produces mass measurements that are always “off” by the same amount

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4
Q

What are Random Errors?

A

Random errors are errors that cannot be avoided and are always present

They Arise from variations in how a student or students record a measurement

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5
Q

How to detect Systematic Errors?

A
  • Analyse samples of known composition
  • Analyse ‘blank’ samples and verify that the instrument will give a zero result
  • Obtain results for a sample using multiple instruments to verify the accuracy of the instrument
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6
Q

What is Hydrogen Carbonate?

A

HCO3-

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7
Q

What is Phosphate?

A

PO4 3-

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8
Q

Metal + Water

A

Metal Hydroxide + Hydrogen

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9
Q

Oxide + Acid

A

Salt + Water

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10
Q

Hydroxide + Acid

A

Salt + Water

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11
Q

Carbonate + Acid

A

Salt + Water + Co2

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12
Q

Hydrogen carbonate + acid

A

Salt + Water + Co2

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13
Q

Ammonia + Acid

A

Ammonium Salt

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14
Q

Metal Carbonate

A

Metal Oxide + Co2

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15
Q

Solubility Rules?

A 
N- itrates
A-cetues
G-roup 1
S-ulfates (Castro Bear + PMS)
A-mmonium
G-roup 17 PMS
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16
Q

Give three reasons why the amount of X is less than the maximum theoretical yield?

A

Reversible, Product lost on Isolation, Other Reactions take place, Reaction hasn’t fully finished

17
Q

1 tonne in g?

A

1000000

18
Q

How to convert MPa into Pa?

A

MPa x 1000000 = Pa

19
Q

How to convert dm3 into m3?

A

dm3/1000 = m3

20
Q

Suggest why there may be a higher mass of mercury?

A

The oxide may contain some mercury

IB Chemistry (18 decks)

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