Asksia AI LOGO


Posted 3 months ago
Exercise 14
At 1000C1000^{\circ} \mathrm{C}, ammonia gas, NH3( g)\mathrm{NH}_{3}(\mathrm{~g}), reacts with oxygen gas to form gaseous nitric oxide, NO(g)\mathrm{NO}(\mathrm{g}), and water vapor. This reaction is the first step in the commercial production of nitric acid by the Ostwald process. Balance the equation for this reaction.
Sign in to unlock the answer
Answer from Sia
Posted 3 months ago
Write the unbalanced chemical equation: The reaction between ammonia (NH3\mathrm{NH}_{3}) and oxygen (O2\mathrm{O}_{2}) to produce nitric oxide (NO\mathrm{NO}) and water (H2O\mathrm{H}_{2}\mathrm{O}) is represented by the unbalanced equation: NH3(g)+O2(g)NO(g)+H2O(g)\mathrm{NH}_{3}(g) + \mathrm{O}_{2}(g) \rightarrow \mathrm{NO}(g) + \mathrm{H}_{2}\mathrm{O}(g)
Balance the nitrogen atoms: There is one nitrogen atom on both sides of the equation, so nitrogen is already balanced
Balance the hydrogen atoms: There are three hydrogen atoms in NH3\mathrm{NH}_{3} and two in H2O\mathrm{H}_{2}\mathrm{O}. To balance the hydrogen atoms, we need to have an even number of hydrogen atoms in the water molecules. Therefore, we put a coefficient of 2 in front of H2O\mathrm{H}_{2}\mathrm{O}: NH3(g)+O2(g)NO(g)+2H2O(g)\mathrm{NH}_{3}(g) + \mathrm{O}_{2}(g) \rightarrow \mathrm{NO}(g) + 2\mathrm{H}_{2}\mathrm{O}(g)
Balance the oxygen atoms: Now, there are four oxygen atoms on the right side (2 from NO\mathrm{NO} and 2 from 2H2O2\mathrm{H}_{2}\mathrm{O}) and two on the left side from O2\mathrm{O}_{2}. To balance the oxygen atoms, we need to put a coefficient of 5/2 in front of O2\mathrm{O}_{2}: NH3(g)+52O2(g)NO(g)+2H2O(g)\mathrm{NH}_{3}(g) + \frac{5}{2}\mathrm{O}_{2}(g) \rightarrow \mathrm{NO}(g) + 2\mathrm{H}_{2}\mathrm{O}(g)
Make all coefficients whole numbers: To avoid having a fraction as a coefficient, we multiply all coefficients by 2: 2NH3(g)+5O2(g)2NO(g)+4H2O(g)2\mathrm{NH}_{3}(g) + 5\mathrm{O}_{2}(g) \rightarrow 2\mathrm{NO}(g) + 4\mathrm{H}_{2}\mathrm{O}(g)
2NH3(g)+5O2(g)2NO(g)+4H2O(g)2\mathrm{NH}_{3}(g) + 5\mathrm{O}_{2}(g) \rightarrow 2\mathrm{NO}(g) + 4\mathrm{H}_{2}\mathrm{O}(g)
Key Concept
Balancing chemical equations
The coefficients in a balanced chemical equation must be the smallest set of whole numbers that balance all the atoms on both sides of the equation.

Not the question you are looking for? Ask here!

Enter question by text

Enter question by image

Upgrade to Asksia Pro

Join a AskSia's Pro Plan, and get 24/7 AI tutoring for your reviews, assignments, quizzes and exam preps.

Unlimited chat query usages
Strong algorithms that better know you
Early access to new release features
Study Other Question