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PH 105 > Redox Reaction > Flashcards

Redox Reaction Flashcards

1
Q

Reactions that involve transfer of electrons

A

Redox Reactions

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2
Q

A reaction which occurs between a reducing and
oxidizing agent

A

Redox Reactions

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3
Q

An increase in oxidation number of an atom signifies?

A

Oxidation from +2 to +4

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4
Q

A decrease in oxidation number of an atom signifies?

A

Reduction from 0 to -1

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5
Q

Oxidation and reduction always occur together in a chemical reaction

A

redox reactions

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6
Q

Very Strong OA na Self-indication and widely used

A

KMnO4

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7
Q

Slightly weaker OA, available as primary standard, and stable

A

K2Cr2O7

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8
Q

Powerful OA, Highly affected by acid used, Very unstable, very expensive

A

Ce(SO4)2

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9
Q

weaker OA, Not suitable in water - KI

A

I2

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10
Q

Powerful OA in the presence of an acid, very sensitive, Methyl orange

A

KBrO3

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11
Q

used in the assay of I^-, As^3+, etc, reduction potential varies with Assay conditions, depends on the formation of ICl in highly acidic solutions

A

KIO3

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12
Q

Standardized using ascorbic acid, self-indicating

A

DCIP

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13
Q

Less common OA, very sensitive to light - requires standardization

A

Ke3Fe(CN)6

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14
Q

Enumerate some oxidizing agents

A

KMnO4
K2CrO7
Ce(SO4)2
I2
KBrO3
KIO3
DCIP
K3Fe(CN)6

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15
Q

Enumerate some reducing agents

A

H2C2O4
Na2S2O3
As2O3
TiCl3
Fe(NH4)2(SO4)2

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16
Q

Residual Titration with KMnO4 and deteriorates upon standing

A

H2C2O4

17
Q

Common RA that is stable to air oxidation, Stable - can be kept for long periods, titer value is affected by bacteria

A

Na2S2O3

18
Q

It is solubilized by NaOH or KOH, a RA in neutral or alkaline medium, and acts as OA in acidic medium

A

As2O3

19
Q

Very power RA, Titration of Fe, Sn, Cr, V, ClO4-

A

TiCl3

20
Q

Slowly oxidized by air in H2SO4 and is a common titrating agent, not a strong RA and can be used to titrate strong OA sych s Ce, Cr, V. Should be standardized

A

Fe(NH4)2(SO4)2

21
Q

For Assay of sulfa drugs and other compounds containing arylamino group

A

NaNO2

22
Q

What are some of the indicators of detection of endpoint

A

Self-indication
Redox Indicators
Starch Indicators
External Indicators

23
Q

employed if the titrant is highly colored

A

Self-indication

24
Q

highly colored dyes that are weak
reducing or oxidizing agents that can be oxidized or
reduced

A

Redox Indicators

PH 105 (6 decks)

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