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Chemistry > Module 5, Section 3 > Flashcards

Module 5, Section 3 Flashcards

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1
Q

What is the colour of MnO4-?

+7

A

Purple

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2
Q

What is the colour of Cr2O72-?

+6

A

Orange

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3
Q

What is the colour of MnO42-?

+6

A

Green

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4
Q

What is the colour of VO2+?

+5

A

Yellow

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5
Q

What is the colour of VO2+?

+4

A

Blue

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6
Q

What is the colour of Ti3+?

+3

A

Purple

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7
Q

What is the colour of V3+?

+3

A

Green

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8
Q

What is the colour of Cr3+?

+3

A

Green

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9
Q

What is the colour of Fe3+?

+3

A

Yellow

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10
Q

What is the colour of Ti2+?

+2

A

Violet

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11
Q

What is the colour of Ni2+?

+2

A

Green

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12
Q

What is the colour of V2+?

+2

A

Violet

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13
Q

What is the colour of Mn2+?

+2

A

Pale pink

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14
Q

What is the colour of Fe2+?

+2

A

Pale green

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15
Q

What is the colour of Co2+?

+2

A

Pink

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16
Q

What is the colour of Cu2+?

+2

A

Pale blue

17
Q

In which reaction does CuSo4 act as a catalyst?

A

Zn + H2SO4 = ZnSO4 + H2

18
Q

In which reaction does MnO2 act as a catalyst?

A

2H2O2 = 2H2O + O2

19
Q

In which reaction does Fe act as a catalyst?

A

N2 + 3H2 = 2NH3

20
Q

What colour is a copper(II) hydroxide precipitate?

A

It goes from a pale blue solution to a blue precipitate.

20
Q

What colour does a copper(II) solution go when reacted with excess NH3?

A

Dark blue

20
Q

What colour is an iron(II) hydroxide precipitate?

A

It goes from a pale green solution to a green precipitate.

21
Q

What colour is an iron(III) hydroxide precipitate?

A

It goes from a yellow solution to an orange precipitate.

22
Q

What colour is a manganese(II) hydroxide precipitate?

A

It goes from a pale pink solution to a pink/buff precipitate.

23
Q

What colour is a chromium(III) hydroxide precipitate?

A

This goes from a green solution to a grey-green precipitate.

24
Q

What colour does a chromium(III) solution go when reacted with excess NaOH?

A

Dark green

25
Q

What colour does a chromium(III) solution go when reacted with excess NH3?

A

Purple colour

26
Q

What is the colour of [Cr(H2O)6]3+?

A

Violet

27
Q

What is the colour of [Cr(NH3)6]3+?

A

Purple

28
Q

What is the colour of [CuCl4]2-?

A

Yellow

29
Q

What colour is a precipitate of Cu2+ when NaOH solution is added?

A

Blue

30
Q

What colour is a precipitate of Fe2+?

A

Green

31
Q

What colour is a precipitate of Fe3+?

A

Orange

32
Q

What colour is a precipitate of Mn2+?

A

Pink/buff

33
Q

What colour is a precipitate of Cr3+?

A

Grey-green

34
Q

In which reaction does V2O5 act as a catalyst?

A

2SO2 + O2 = 2SO3

35
Q

When is nickel used as a catalyst?

A

In the hydrogenation of vegetable fats in the manufacture of margarine.

Chemistry (10 decks)

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