Worksheet: Reaction Equations

In this worksheet, we will practice constructing equations for chemical reactions and writing them using words or chemical symbols.


What is the meaning of the arrow () in a chemical reaction equation?

  • ABecomes
  • BIs like
  • CCannot become
  • DIs the same as
  • EIs made of


In which part of a chemical reaction equation are the reactants of the reaction written?

  • ABelow the arrow
  • BAbove the arrow
  • CTo the left of the arrow
  • DTo the right of the arrow


In which part of a chemical reaction equation are the products of the reaction written?

  • AAbove the arrow
  • BTo the right of the arrow
  • CBelow the arrow
  • DTo the left of the arrow


An experiment shows that hydrogen peroxide decomposes to form water and oxygen gas. Which of the following word equations describes the chemical reaction that has occurred in this experiment?

  • AHydrogenperoxidehydrogenoxygenperoxide+
  • BHydrogenperoxidewateroxygen+
  • CHydrogenperoxidewateroxygen+
  • DHydrogenperoxideperoxidehydrogen+
  • EHydrogenperoxideoxygenwater+


Hydrogen gas can be produced by reacting zinc with sulfuric acid. This reaction also produces zinc sulfate. Which of the following symbol equations shows this chemical reaction?

  • AZnSO+HZn+HSO4224
  • BZn+HSOZnSO+H2442
  • CZnHSOH+ZnSO2424
  • DH+HSOZn+ZnSO2244
  • EZn+HZnSO+HSO2424


Which of these statements describes the chemical reaction shown in the following symbolic equation? CH+2OCO+2HO4222

  • AMethane burns in carbon dioxide to produce oxygen and water.
  • BMethane decomposes under heat to produce oxygen, carbon dioxide, and water.
  • CCarbon dioxide reacts with water to produce methane and oxygen.
  • DOxygen reacts with water to produce methane and carbon dioxide.
  • EMethane burns in oxygen to produce carbon dioxide and water.


When aqueous silver nitrate is mixed with aqueous sodium chloride, a white solid precipitate of silver chloride is produced. The symbol equation for this reaction is shown below. AgNO()+NaCl()AgCl()+NaNO()33 What state symbols should be added to each compound to complete the equation?

  • Aaq, s, l, aq
  • Bl, l, s, aq
  • Cs, aq, aq, aq
  • Ds, s, g, aq
  • Eaq, aq, s, aq


The formation of ammonia from nitrogen and hydrogen is a reversible reaction. What is the full symbol equation (including state symbols) for this chemical reaction?

  • ANH()NH()ss3
  • BN()+H()NH()ggg3
  • CN()+H()NH()223aqaqs
  • DN()+H()NH()223ggs
  • EN()+H()NH()223ggg


The symbol equation for the decomposition of iron(II) sulfate is given below. FeSOFeO+SO+SO42323

What is the reactant in this chemical reaction?

  • AFeSO4
  • BSO3
  • CFe
  • DSO2
  • EFeO23


In the process of photosynthesis, carbon dioxide and water react together, in the presence of sunlight, to produce glucose and oxygen. Which of the following word equations describes this chemical reaction?

  • ACarbondioxidewaterglucoseoxygen++
  • BOxygencarbondioxidewaterglucose++
  • COxygenwatercarbondioxideglucose++
  • DWaterglucoseoxygencarbondioxide++
  • EWatercarbondioxideoxygenglucose++


The symbol equation for a chemical reaction is shown below. NaOH+HSONaSO+HO24242

What are the products of this reaction?

  • ANaSO+HSO2424
  • BHO+NaOH2
  • CNaSO+HO242
  • DHO+HSO224
  • ENaOH+HSO24


Solid calcium carbonate decomposes upon heating to produce carbon dioxide and solid calcium oxide. Which of the following symbolic equations, with state symbols, describes this chemical reaction?

  • ACaCO()+O()CaO()+CO()322sgsg
  • BCaCO()CaO()+CO()32ggs
  • CCaCO()CaO()+CO()23sgg
  • DCaCO()CaO()+CO()32ssg
  • ECaCO()+CO()CaO()32sgs


The reaction of hydrogen and iodine to produce hydrogen iodide is shown below. H()+I()2HI()22ggg

What is the meaning of the arrow () in this chemical reaction equation?

  • AThe reaction is irreversible.
  • BUltraviolet light is needed for the reaction to work.
  • CThere is a change in the state of matter.
  • DHeat is needed for the reaction to work.
  • EThe reaction is reversible.


What compound should be included in the blank to complete the following chemical reaction? NaHCO()+HCl()+HO()+CO()322saqlg

  • ANaO()2s
  • BNaH()aq
  • CNaCl()aq
  • DNaO()2s
  • ENaCO()23aq

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