Final answer:
In the reaction between copper (II) chloride and sodium nitrate, 15 grams of copper (II) chloride react with 20 grams of sodium nitrate to produce 15 grams of sodium chloride.
Step-by-step explanation:
In the double-replacement reaction between copper (II) chloride (CuCl₂) and sodium nitrate (NaNO₃), copper (II) chloride and sodium nitrate react to form copper (II) nitrate (Cu(NO₃)₂) and sodium chloride (NaCl). According to the balanced equation:
CuCl₂ (aq) + 2 AgNO₃ (aq) → Cu(NO₃)₂ (aq) + 2 AgCl (s)
Based on the stoichiometry of the reaction, 15 grams of copper (II) chloride react with 20 grams of sodium nitrate to produce 15 grams of sodium chloride (NaCl). Therefore, option a) 10 grams is incorrect. The correct answer is option d) 25 grams.