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Chemistry > Reaction of alkali metals with water > Flashcards

Reaction of alkali metals with water Flashcards

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1
Q

Which group of the periodic table can you find the alkali metals?

A

Group 1

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2
Q

What are the names and symbols of all the metals in group 1?

A

Lithium - Li
Sodium - Na
Potassium - K
Rubidium - Rb
Caesium - Cs
Francium - Fr

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3
Q

What are group 1 metals stored in?

A

Oil

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4
Q

Why are group 1 metals stored in oil?

A

To stop them reacting with water vapour ad oxygen

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5
Q

What is the appearance of Lithium?

A

Black, dull solid

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6
Q

What is the appearance of sodium?

A

White solid

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7
Q

What is the appearance of potassium?

A

Grey, dull solid

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8
Q

What does lithium look like when freshly cut?

A

Shiny, grey, fairly hard to cut

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9
Q

What does sodium look like when freshly cut?

A

Shiny, softer than lithium to cut

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10
Q

What does potassium look like when freshly cut?

A

Shiny, softest

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11
Q

What is the trend in hardness fro the group 1 metals as you go down the group?

A

Gets softer as you go down the group

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12
Q

What can be oberved when lithium reacts with water?

A

Effervescence
Substance floats
Substance moves
Smoke
Remains black

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13
Q

What can be oberved when sodium reacts with water?

A

Effervescence
Substance floats
Substance moves
Smoke
Melts into a ball

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14
Q

What can be oberved when potassium reacts with water?

A

Lilac flame
Substance explodes
Lots of sparks

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15
Q

What is the word equation for the reaction of lithium with water?

A

Lithium + water –> Lithium hydroxide + hydrogen

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16
Q

What is the word equation for the reaction of sodium with water?

A

Sodium + water –> Sodium hydroxide + hydrogen

17
Q

What is the word equation for the reaction of potassium with water?

A

Potassium + water –> Potassium hydroxide + hydrogen

18
Q

What is the trend in reactivity as yo go down the group 1 metals?

A

As you go down the group the metals become more reactive

19
Q

How can you test for the presence of hydrogen?

A

If you hold a lit splint over then substance, you should hear a squeaky pop

Chemistry (11 decks)

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