1. Classify each of the substances as being soluble or insoluble in water.
a. KBr – sol
b. PbCO₃ – insol
c. BaSO₄ – insol
d. zinc hydroxide – insol
e. sodium acetate – sol
f. silver iodide – insol
g. cadmium (II) sulfide – insol
h. zinc carbonate – insol
i. silver acetate – sol
j. copper (II) sulfide – insol
k. Mg₃(PO₄)₂ – insol
l. KOH – sol
m. NiCl₂ – sol
n. NH₄OH – sol
o. Hg₂SO₄ – insol
p. PbI₂ – insol
2. Identify the two new compounds which form if the solutions, as suggested by the following table, were mixed. CIRCLE the names of the compounds which would precipitate from the solutions.
AgNO₃ + KBr → AgBr (precipitate) + KNO₃
AgNO₃ + Na₂CO₃ → Ag₂CO₃ (precipitate) + NaNO₃
AgNO₃ + CaS → Ca(NO₃)₂ + Ag₂S (precipitate)
AgNO₃ + NH₄OH → AgOH (precipitate) + NH₄NO₃
BaCl₂ + KBr → KCl + BaBr₂ (both soluble — no precipitate)
BaCl₂ + Na₂CO₃ → BaCO₃ (precipitate) + NaCl
BaCl₂ + CaS → CaCl₂ + BaS (both soluble — no precipitate)
BaCl₂ + NH₄OH → Ba(OH)₂ (slightly soluble, may form precipitate) + NH₄Cl
Al(NO₃)₃ + KBr → AlBr₃ + KNO₃ (both soluble — no precipitate)
Al(NO₃)₃ + Na₂CO₃ → Al₂(CO₃)₃ (precipitate) + NaNO₃
Al(NO₃)₃ + CaS → Ca(NO₃)₂ + Al₂S₃ (precipitate)
Al(NO₃)₃ + NH₄OH → Al(OH)₃ (precipitate) + NH₄NO₃
CuSO₄ + KBr → CuBr₂ + K₂SO₄ (both soluble — no precipitate)
CuSO₄ + Na₂CO₃ → CuCO₃ (precipitate) + Na₂SO₄
CuSO₄ + CaS → CaSO₄ (slightly soluble, may form precipitate) + CuS (precipitate)
CuSO₄ + NH₄OH → Cu(OH)₂ (precipitate) + (NH₄)₂SO₄
Parent Tip: Review the logic above to help your child master the concept of naming rules worksheet 1 answer key.
