Group 2 - periodicty

Hi, question:

A solution contains ions of a group 2 element, M. When aqueous sodium hydroxide is added a white precipiatte forms. This preciptate dissolves in an excesss aqueous sodium hyroxide.

Identify M and write ionic equations for the two reactions.

thanks in advance

Reply 1

1

could be barium (ba)

Reply 2

Study Forum Helper

18

can't be barium cos the hydroxide is soluble
it's beryllium

Reply 3

1

sorry thats what i meant hehe i knew it was b.... lol

Reply 4

ukap

Hi, question:

A solution contains ions of a group 2 element, M. When aqueous sodium hydroxide is added a white precipiatte forms. This preciptate dissolves in an excesss aqueous sodium hyroxide.

Identify M and write ionic equations for the two reactions.

thanks in advance

I don't really like berylium. It's amphoteric and its ions are confusing.
(Be2+) + (2OH-) = Be(OH)2
(Be(OH)2) + (2OH-) = [Be(OH)4]-2

Reply 5

1

yh probably beryllium - (lucky for me AQA have taken it 0ut of the first module - l0l)

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