Double replacement and solubility rules

Answer Key - Grade 10 Science Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   In AgNO₃ + NaCl → AgCl + NaNO₃, 4 units of AgCl form. How many spectator ions, Na⁺ and NO₃⁻ together, stay dissolved, Ari?

   8 ions
2. 2.

   In AgNO₃ + NaCl → AgCl + NaNO₃, 7 units of AgCl form. How many spectator ions, Na⁺ and NO₃⁻ together, stay dissolved, Bo?

   14 ions
3. 3.

   In AgNO₃ + NaCl → AgCl + NaNO₃, 9 units of AgCl form. How many spectator ions, Na⁺ and NO₃⁻ together, stay dissolved, Esme?

   18 ions
4. 4.

   Will a solid form when sodium chloride and potassium nitrate solutions meet, Jun?

   • Yes: KCl forms a solid
   • No: both possible products dissolve
   • Yes: NaNO₃ forms a solid
5. 5.

   Will a solid form when calcium chloride and sodium phosphate solutions meet, Luz?

   • Yes: NaCl
   • Yes: Ca₃(PO₄)₂
   • No: the products dissolve
6. 6.

   Which state symbols fit CaCl₂(aq) + Na₂CO₃(aq) → CaCO₃ + 2 NaCl, Noah?

   • CaCO₃(aq) and NaCl(aq)
   • CaCO₃(aq) and NaCl(s)
   • CaCO₃(s) and NaCl(aq)
7. 7.

   In FeCl₃(aq) + 3 NaOH(aq) → Fe(OH)₃ + 3 NaCl, which product gets (s), Pia?

   • NaCl
   • Both products
   • Fe(OH)₃
8. 8.

   Copper(II) sulfate solution meets sodium hydroxide solution. Which precipitate forms, Ren?

   • Na₂SO₄
   • CuNa₂
   • Cu(OH)₂
9. 9.

   Silver nitrate solution meets potassium iodide solution. Which yellow precipitate forms, Tala?

   • AgI
   • AgK
   • KNO₃
10. 10.

    Iron(III) chloride solution meets sodium hydroxide solution. Which insoluble solid forms, Zee?

    • Fe(OH)₃
    • NaCl
    • FeOH