Questions: In the reaction between HNO3 and Ba(OH)2 (assume complete reaction of the Ba(OH)2), the spectator ions are A Ba2+ and NO3- B H+and NO3 - C H+and OH- D Ba2+ and OH-

In the reaction between HNO3 and Ba(OH)2 (assume complete reaction of the Ba(OH)2), the spectator ions are

A Ba2+ and NO3-

B H+and NO3 -

C H+and OH-

D Ba2+ and OH-

Transcript text: In the reaction between $\mathrm{HNO}_{3}$ and $\mathrm{Ba}(\mathrm{OH})_{2}$ (assume complete reaction of the $\left.\mathrm{Ba}(\mathrm{OH})_{2}\right)$, the spectator ions are A $\mathrm{Ba}^{2+}$ and $\mathrm{NO}_{3}^{-}$ B $\mathrm{H}^{+}$and $\mathrm{NO}_{3}{ }^{-}$ C $\mathrm{H}^{+}$and $\mathrm{OH}^{-}$ D $\mathrm{Ba}^{2+}$ and $\mathrm{OH}^{-}$

Solution

Solution Steps

Step 1: Identify the Reaction

The reaction between nitric acid ($\mathrm{HNO}_3$) and barium hydroxide ($\mathrm{Ba(OH)}_2$) is a neutralization reaction. The balanced chemical equation for this reaction is:

\[ \mathrm{2HNO}_3 + \mathrm{Ba(OH)}_2 \rightarrow \mathrm{Ba(NO}_3)_2 + 2\mathrm{H}_2\mathrm{O} \]

Step 2: Determine the Ions in Solution

In aqueous solution, the compounds dissociate into their respective ions:

$\mathrm{HNO}_3$ dissociates into $\mathrm{H}^+$ and $\mathrm{NO}_3^-$.
$\mathrm{Ba(OH)}_2$ dissociates into $\mathrm{Ba}^{2+}$ and $\mathrm{OH}^-$.

Step 3: Identify the Spectator Ions

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged in the solution. In this reaction:

$\mathrm{H}^+$ from $\mathrm{HNO}_3$ reacts with $\mathrm{OH}^-$ from $\mathrm{Ba(OH)}_2$ to form water ($\mathrm{H}_2\mathrm{O}$).
$\mathrm{Ba}^{2+}$ and $\mathrm{NO}_3^-$ do not participate in the formation of water and remain in the solution as ions.