Chemistry Practice Problems Types of Chemical Reactions Practice Problems Solution: Use the following equations to answer the next fou...

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Solution: Use the following equations to answer the next four questions:i. H2O(s) ⟶ H2O(l)ii. Na+(aq) + Cl−(aq) + Ag+(aq) + NO3−(aq) ⟶ AgCl(s) + Na+(aq) + NO3−(aq)iii. CH3OH(g) + O2(g) ⟶ CO2(g) + H2O(g)iv. 2H2O(l) ⟶ 2H2(g) + O2(g)v. H+(aq) + OH−(aq) ⟶ H2O(l)(b) Which equation identifies the reactants and products of a combustion reaction?

Problem

Use the following equations to answer the next four questions:

i. H2O(s) ⟶ H2O(l)

ii. Na+(aq) + Cl(aq) + Ag+(aq) + NO3−(aq) ⟶ AgCl(s) + Na+(aq) + NO3−(aq)

iii. CH3OH(g) + O2(g) ⟶ CO2(g) + H2O(g)

iv. 2H2O(l) ⟶ 2H2(g) + O2(g)

v. H+(aq) + OH(aq) ⟶ H2O(l)

(b) Which equation identifies the reactants and products of a combustion reaction?


Solution

Recall: A combustion reaction is a type of redox reaction where a compound (called the fuel) reacts with an oxidant (usually oxygen gas, O2) to form oxidized compounds. During combustion, the fuel is oxidized (loses electrons) while the oxidant is reduced (gains electrons).

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