1) No reaction. Silver sulfate (Ag₂SO₄) is only slightly soluble, and sodium nitrate (NaNO₃) is soluble. No precipitate, gas, or water forms to drive a double displacement reaction.
2) 2 NaI + CaSO₄ → CaI₂ + Na₂SO₄. Both products are soluble, so the reaction is reversible and does not proceed to completion under normal conditions. However, if driven by concentration or removal of products, it can occur.
3) 2 HNO₃ + Ca(OH)₂ → Ca(NO₃)₂ + 2 H₂O. This is an acid-base neutralization reaction producing soluble calcium nitrate and water.
4) CaCO₃ → CaO + CO₂ (upon heating). Calcium carbonate decomposes when heated strongly to form calcium oxide and carbon dioxide gas.
5) AlCl₃ + (NH₄)₃PO₄ → AlPO₄ + 3 NH₄Cl. Aluminum phosphate (AlPO₄) is insoluble and precipitates, driving the double displacement reaction.
6) Pb + Fe(NO₃)₃ → No reaction. Lead (Pb) is less reactive than iron (Fe) according to the activity series, so it cannot displace iron from its compound.
7) 2 C₃H₆ + 9 O₂ → 6 CO₂ + 6 H₂O. This is the complete combustion of propene, producing carbon dioxide and water.
8) No reaction. Sodium (Na) is highly reactive, but calcium sulfate (CaSO₄) is not soluble enough in water to allow a significant single displacement reaction. Sodium would react violently with water instead if present.
Parent Tip: Review the logic above to help your child master the concept of predicting reaction products worksheet answers.
