Questions: A new ion with a formula of XO3 is discovered. When combined with sodium, the new polyatomic ion forms a compound with a formula Na3XO3. What is the charge on the XO3 ion?

A new ion with a formula of XO3 is discovered. When combined with sodium, the new polyatomic ion forms a compound with a formula Na3XO3. What is the charge on the XO3 ion?

Transcript text: A new ion with a formula of $\mathrm{XO}_{3}$ is discovered. When combined with sodium, the new polyatomic ion forms a compound with a formula $\mathrm{Na}_{3} \mathrm{XO}_{3}$. What is the charge on the $\mathrm{XO}_{3}$ ion?

Solution

Solution Steps

Step 1: Determine the Charge of Sodium Ion

Sodium (Na) is an alkali metal and typically forms a cation with a charge of $+1$. Therefore, each sodium ion in the compound $\mathrm{Na}_3\mathrm{XO}_3$ has a charge of $+1$.

Step 2: Calculate the Total Positive Charge from Sodium Ions

Since there are three sodium ions in the compound $\mathrm{Na}_3\mathrm{XO}_3$, the total positive charge contributed by the sodium ions is:

\[ 3 \times (+1) = +3 \]

Step 3: Determine the Charge on the $\mathrm{XO}_3$ Ion

For the compound $\mathrm{Na}_3\mathrm{XO}_3$ to be electrically neutral, the total positive charge must be balanced by the total negative charge. Therefore, the charge on the $\mathrm{XO}_3$ ion must be $-3$ to balance the $+3$ charge from the sodium ions.

Final Answer

The charge on the $\mathrm{XO}_3$ ion is $\boxed{-3}$.

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