Question

predicting the products of a synthesis reaction
based on the synthesis reaction, what would the product of the reaction be?
napo₃ + cuo → ?
nao + cupo₃
na + p + cu + o₄
nacupo₄
nacu + po₄

Explanation:

Step1: Recall Synthesis Reaction

A synthesis reaction combines reactants into a single product. Here, \( \text{NaPO}_3 \) and \( \text{CuO} \) should combine ions.

Step2: Analyze Ions

\( \text{NaPO}_3 \) has \( \text{Na}^+ \) and \( \text{PO}_3^- \); \( \text{CuO} \) has \( \text{Cu}^{2+} \) and \( \text{O}^{2-} \)? Wait, no—rearrange ions: \( \text{Na}^+ \), \( \text{Cu}^{2+} \), \( \text{PO}_3^- \), \( \text{O}^{2-} \)? Wait, better: combine cations and anions. Wait, \( \text{NaPO}_3 \) (sodium metaphosphate) and \( \text{CuO} \) (copper(II) oxide) in synthesis: the product should be a single compound. Let's check formulas:

• Option 1: \( \text{NaO} + \text{CuPO}_3 \) is decomposition, not synthesis.
• Option 2: \( \text{Na} + \text{P} + \text{Cu} + \text{O}_4 \) is decomposition into elements, wrong.
• Option 3: \( \text{NaCuPO}_4 \): Let's check charges. \( \text{Na}^+ \), \( \text{Cu}^{2+} \), \( \text{PO}_4^{3-} \)? Wait, no—wait, \( \text{PO}_3^- \) and \( \text{O}^{2-} \) can combine? Wait, maybe the reaction is \( \text{NaPO}_3 + \text{CuO}

ightarrow \text{NaCuPO}_4 \) (balancing: Na, Cu, P, O: 1,1,1, 3+1=4? Yes, \( \text{NaCuPO}_4 \) has 4 O. So this is a synthesis (combination) into a single compound.

• Option 4: \( \text{NaCu} + \text{PO}_4 \) is two compounds, not synthesis.

So the correct product is \( \text{NaCuPO}_4 \).

Answer:

C. NaCuPO₄ (assuming option 3 is labeled C, as per the options shown: third option is NaCuPO₄)