Use the precipitation interactive to select the solution that reacts with the Ba(NO3)2 solution to form a white solid.

Question

https://gyazo.com/6af5e9c3e5eafc30161a3ba664f5264f

K2CO3 is correct.

Identify the precipitate that forms and the spectator ions that remain in the solution following this reaction.

Answer 1

The molecular form of the equation is the easiest to understand: The salts swap partners driven by precipitation, the formation of a molecule (like water from an acid-base reaction, or a gas that leaves the solution by bubbling away making the reaction go forward). In words:

potassium carbonate + barium nitrate → potassium nitrate + barium carbonate(ppt)

We know that barium carbonate is insoluble from the rule: all carbonates are insoluble except ammonium and !A metal carbonates.

Write in formula form and balance:

K₂CO₃(aq) + Ba(NO₃)₂(aq) ⇒ 2KNO₃(aq) + BaCO₃(s)

Because the aqueous salts are actually dissociated ions in solution, we can write the net ionic equation (K⁺ and NO₃^- are spectator ions) as

Ba²⁺ + CO₃^- ⇒ BaCO₃

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