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Chapter 6: Problem 15

If a sample of pure hydrogen gas is ignited very carefully, the hydrogen burns gently, combining with the oxygen gas of the air to form water vapor. Write the unbalanced chemical equation for this reaction.

Short Answer

Expert verified
The balanced chemical equation for the combustion of hydrogen gas with oxygen gas to form water vapor is: \[ 2H_{2} + O_{2} \rightarrow 2H_{2}O \]

Step by step solution

01

Identify the reactants and products

In this reaction, hydrogen (H2) and oxygen (O2) are the reactants, and the product is water vapor (H2O). Step 2: Writing the unbalanced equation
02

Write the chemical symbols for the reactants and products

Now that we know the reactants and products, we can write the unbalanced chemical equation: \[ H_{2} + O_{2} \rightarrow H_{2}O \] Step 3: Balancing the chemical equation
03

Adjust the coefficients to balance the equation

Currently, the equation is not balanced because there are two oxygen atoms on the left side of the equation and only one on the right side. To balance the equation, we can adjust the coefficients. Place a 2 in front of H2O: \[ H_{2} + O_{2} \rightarrow 2H_{2}O \] Now we have 2 hydrogen atoms on the left and 4 on the right. To balance the hydrogen atoms, place a 2 in front of H2: \[ 2H_{2} + O_{2} \rightarrow 2H_{2}O \] The balanced equation should look like this: \[ 2H_{2} + O_{2} \rightarrow 2H_{2}O \]

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Most popular questions from this chapter

Balance each of the following chemical equations. a. \(\mathrm{KO}_{2}(s)+\mathrm{H}_{2} \mathrm{O}(l) \rightarrow \mathrm{KOH}(a q)+\mathrm{O}_{2}(g)+\mathrm{H}_{2} \mathrm{O}_{2}(a q)\) b. \(\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+\mathrm{HNO}_{3}(a q) \rightarrow \mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}(a q)+\mathrm{H}_{2} \mathrm{O}(l)\) c. \(\mathrm{NH}_{3}(g)+\mathrm{O}_{2}(g) \rightarrow \mathrm{NO}(g)+\mathrm{H}_{2} \mathrm{O}(g)\) d. \(\mathrm{PCl}_{5}(l)+\mathrm{H}_{2} \mathrm{O}(l) \rightarrow \mathrm{H}_{3} \mathrm{PO}_{4}(a q)+\mathrm{HCl}(g)\) e. \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)+\mathrm{O}_{2}(g) \rightarrow \mathrm{CO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l)\) f. \(\operatorname{CaO}(s)+\mathrm{C}(s) \rightarrow \mathrm{CaC}_{2}(s)+\mathrm{CO}_{2}(g)\) g. \(\operatorname{MoS}_{2}(s)+\mathrm{O}_{2}(g) \rightarrow \operatorname{MoO}_{3}(s)+\mathrm{SO}_{2}(g)\)h. \(\operatorname{Fe} \mathrm{CO}_{3}(s)+\mathrm{H}_{2} \mathrm{CO}_{3}(a q) \rightarrow \mathrm{Fe}\left(\mathrm{HCO}_{3}\right)_{2}(a q)\)

Liquefied propane gas is often used for cooking in suburban areas away from natural gas lines. Propane \(\left(\mathrm{C}_{3} \mathrm{H}_{8}\right)\) burns in oxygen gas, producing carbon dioxide gas, water vapor, and heat. Write the unbalanced chemical equation for this process.

After balancing a chemical equation, we ordinarily make sure that the coefficients are the smallest ________ possible.

Acetylene gas \(\left(\mathrm{C}_{2} \mathrm{H}_{2}\right)\) is often used by plumbers, welders, and glass blowers because it burns in oxygen with an intensely hot flame. The products of the combustion of acetylene are carbon dioxide and water vapor. Write the unbalanced chemical equation for this process.

Although silver is not easily attacked by acids (and for that reason it has been used to make jewelry and household items), it will dissolve in concentrated nitric acid, producing brown NO gas and leaving a solution of silver nitrate in water. Write the unbalanced chemical equation for this process.
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