Worksheet: Reaction Equations

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

Q1:

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

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

Q2:

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

Q3:

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

Q4:

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+

Q5:

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

Q6:

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.

Q7:

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

Q8:

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

Q9:

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

Q10:

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++

Q11:

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

Q12:

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

Q13:

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.

Q14:

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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