3. Chemical Reactions

Balancing Chemical Equations

Multiple Choice
What is the net ionic equation for the reaction Zn + 2HCl → ZnCl2 + H2?
Open Question
Write a balanced chemical equation based on the following description:
propanol, C₃H₇OH(l) burns in air to produce gaseous carbon dioxide and water vapor
Multiple Choice
What are the balanced coefficients for the reaction C4H6(g) + O2(g) → CO2(g) + H2O(g)?
Open Question
Na₂SO₃ represents sodium sulfite. What does the 4 mean in the formula 4 Na₂SO₃?
Open Question
Enter a balanced chemical equation for the reaction of solid potassium with liquid water.
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Multiple Choice
Balance the following equation: ____K2CrO4(aq) + ____Na2SO3(aq) + ____HCl(aq) → ____KCl(aq) + ____Na2SO4(aq) + ____CrCl3(aq) + ____H2O(l). What are the correct coefficients for K2CrO4, Na2SO3, and HCl, respectively?
Open Question
Which coefficient of O2 is needed to balance the equation C₃H₈ + O₂ → 3 CO₂ + 4 H₂O?
Open Question
When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(iii) oxide.
Multiple Choice
What is the balanced chemical equation for the reaction between copper(II) nitrate and sodium phosphate to form copper(II) phosphate and sodium nitrate?
Multiple Choice
Which of the following is the balanced molecular equation for the reaction between NaOH (aq) and HNO3 (aq)?
Multiple Choice
Balance the following equation in standard form and determine the sum of the coefficients: LiAlH4(s) + AlCl3(s) → AlH3(s) + LiCl(s).
Open Question
The equilibrium system between hydrogen gas, bromine gas, and hydrogen bromide gas is given.
Multiple Choice
What is the correct sequence of coefficients when the equation CS2(l) + O2(g) → CO2(g) + SO2(g) is balanced?
Multiple Choice
In the following equation what is the mole ratio of NaOH to H₂O, respectively?
___NaOH (aq) + ___ H₃PO₄(aq) → ___ H₂O(l) + ___ Na₃PO₄(aq)
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Open Question
Gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (ch4) and liquid water.