[miss_maple]

what forms a diatomic molecule with a triple bond ?

(i)write the equation for the reaction between barium and water.
my ans : chemical equation: barium + water → barium oxide + hydrogen ?

(ii) what would you expect to see if carbon dioxide is passed into the solution remaining from the reaction in  (i)[the abv qns]. Give a reason.

_{Mod edit - I've changed the subject of your post to be formatted as a question - please do this in future to help keep the forum tidy and easy to navigate.  Thanks!}

[blakestyger]

Look at the periodic table - Ba is the same grp as Ca (Gp II) so it's chemical properties will be similar.
Drop some in water and you'll get the hydroxide, bubble CO₂ through it and you'll precipitate the carbonate (all carbonates are insoluble except Na).

[RD]

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[lightarrow]

(all carbonates are insoluble except Na).

Many other carbonates are soluble:

K₂CO₃
Rb₂CO₃
Cs₂CO₃
(NH₄)₂CO₃

Li₂CO₃ is soluble a little.

[blakestyger]

OK - it's been a long time. [:I]

[miss_maple]

oh . ok . learnt alot. THANK YOU everyone . how about the universal indicator ? what colour does it produce when in acid, alkali and neutral ?

[RD]

how about the universal indicator ?

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