What do you predict you would observe if you put a piece of Ba metal in water, with a phenolphthalein indicator? Would it heat up? Would gas form? Would the solution change color? Would the appearance of metal change?

Based on observations of Mg and Ca (group IIA, alkaline earth
metals) reactions with water,

1 Answer
anor277
Dec 6, 2017

#"The answer is yes, yes, yes, and yes...."#

Explanation:

We can represent the chemical reaction, which in fact is a redox reaction, by the following stoichiometric equation....

#Ba(s) + 2H_2O(l) rarr Ba(OH)_2(aq) +H_2(g)+Delta #

Barium is an alkaline earth metal, and fairly reactive....Because in solution you placed some phenolphthalein indicator, the which in acid solution is COLOURLESS, but in basic solution a lovely purple colour, the solution will acquire a lovely purple colour. The metal will visibly react and go up into solution to give its hydroxide salt.

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