Writing and Balancing Chemical Equations (CHEM 1405)

Back to Chemistry 1405 Practice Problems

 

Read each statement. 

Write the correct formula for the substance indicated

Replace each “and” or “plus” with the symbol “+”.

Replace each phrase indicating change (make, produces, yield, etc.) with an arrow pointing toward the right. 

Balance each equation.  Show work if necessary.

 

Example:

Lead II nitrate and potassium carbonate produce lead II carbonate and potassium nitrate.

Pb(NO3)2     +      K2CO3         Arrow-1.png         PbCO3    +    KNO3

                               Pb-1                                                       Pb-1

                               N-2                                                         N-1

                               O-9                                                         O-6

                               K-2                                                          K-1

                               C-1                                                          C-1

 

  1. aluminum and oxygen make aluminum oxide

 

 

 

  1. sodium hydroxide and sulfuric acid produce sodium sulfate and water

 

 

 

  1. iron and copper II chloride make iron II chloride and copper

 

 

 

  1. potassium chlorate decomposes into potassium chloride and oxygen

 

 

 

  1. magnesium and silver nitrate react to form magnesium nitrate and silver

 

 

 

  1. silicon tetrachloride produces silicon and chlorine gas

 

 

 

  1. sodium sulfite and calcium chloride yield calcium sulfite and sodium chloride

 

 

 

  1. diphosphorus pentoxide and barium oxide make barium phosphate

 

 

 

  1. calcium and water react to form calcium hydroxide and hydrogen gas

 

 

 

  1. iron II oxide and hydrogen chloride make iron II chloride and hydrogen hydroxide

 

 

 

  1. ammonium chloride and barium hydroxide produce ammonium hydroxide and barium chloride

 

 

 

  1. potassium nitrate produces potassium nitrite and oxygen

 

 

 

  1. nitrogen monoxide and oxygen combine to form nitrogen dioxide

 

 

 

  1. copper and oxygen make copper II oxide

 

 

 

  1. iron III hydroxide produces iron III oxide and water

 

 

 

  1. calcium oxide and sulfur dioxide make calcium sulfite

 

 

 

  1. magnesium and hydrogen nitrate react to produce magnesium nitrate and hydrogen gas

 

 

 

  1. zinc carbonate produces zinc oxide and carbon dioxide

 

 

 

  1. calcium sulfate and sodium carbonate make calcium carbonate and sodium sulfate