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CHE 105/110 Introduction to Chemistry - Exercises and Answers

Types of Chemical Reactions: Single- and Double-Displacement Reactions

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QUESTION ANSWER

1.

What are the general characteristics that help you recognize single-replacement reactions?

1.

One element replaces another element in a compound.

3.

Assuming that each single-replacement reaction occurs, predict the products and write each balanced chemical equation.

  1. Zn + Fe(NO3)2 → ?
  2. F2 + FeI3 → ?
     

3.

  1. Zn + Fe(NO3)2 → Zn(NO3)2 + Fe
  2. 3F2 + 2FeI3 → 3I2 + 2FeF3

5.

Assuming that each single-replacement reaction occurs, predict the products and write each balanced chemical equation.

  1. Sn + H2SO4 → ?
  2. Al + NiBr2 → ?
     

5.

  1. Sn + H2SO4 → SnSO4 + H2
  2. 2Al + 3NiBr2 → 2AlBr3 + 3Ni

7.

Use the periodic table or the activity series to predict if each single-replacement reaction will occur and, if so, write a balanced chemical equation.

  1. FeCl2 + Br2 → ?
  2. Fe(NO3)3 + Al → ?

7.

  1. No reaction occurs.
  2. Fe(NO3)3 + Al → Al(NO3)3 + Fe

9.

Use the periodic table or the activity series to predict if each single-replacement reaction will occur and, if so, write a balanced chemical equation.

  1. NaI + Cl2 → ?
  2. AgCl + Au → ?

9.

  1. 2NaI + Cl2 → 2NaCl + I2
  2. No reaction occurs.

11.

Assuming that each double-replacement reaction occurs, predict the products and write each balanced chemical equation.

  1. Zn(NO3)2 + NaOH → ?
  2. HCl + Na2S → ?
     

11.

  1. Zn(NO3)2 + 2NaOH→ Zn(OH)2 + 2NaNO3
  2. 2HCl + Na2S → 2NaCl + H2S

13.

Assuming that each double-replacement reaction occurs, predict the products and write each balanced chemical equation.

  1. Pb(NO3)2 + KBr → ?
  2. K2O + MgCO3 → ?
     

13.

  1. Pb(NO3)2 + 2KBr → PbBr2 + 2KNO3
  2. K2O + MgCO3 → K2CO3 + MgO

15.

 

Use the solubility rules to predict if each double-replacement reaction will occur and, if so, write a balanced chemical equation.

  1. Pb(NO3)2 + KBr → ?
  2. K2O + Na2CO3 → ?
     

15.

  1. Pb(NO3)2 + 2KBr → PbBr2(s) + 2KNO3
  2. No reaction occurs.

17.

Use the solubility rules to predict if each double-replacement reaction will occur and, if so, write a balanced chemical equation.

  1. K3PO4 + SrCl2 → ?
  2. NaOH + MgCl2 → ?
     

17.

  1. 2K3PO4 + 3SrCl2 → Sr3(PO4)2(s) + 6KCl
  2. 2NaOH + MgCl2 → 2NaCl + Mg(OH)2(s)

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