wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Complete and balance the equation given below:

P+HNO3


Open in App
Solution

  1. Nitric acid(HNO3) acts as an oxidizing agent.
  2. The reaction between Phosphorous and Nitric acid(HNO3) gives Nitrogen dioxide(NO2), water, and Phosphoric acid.
  3. The Phosphoric acid produces in the reaction is a white crystalline solid.
  4. The chemical reaction occur as follows:P(s)(Phosphorous)+HNO3(l)(Nitricacid)NO2(g)(Nitrogendioxide)+H3PO4(s)(Phosphoricacid)+H2O(l)

The obtained equation is unbalanced, to balance this equation we first need to calculate the number of molecules on both sides of the reaction.

Step 1: Counting the number of molecules on both sides.

  1. On the reactant side: 1 Hydrogen, 1 Nitrogen, and 3 Oxygen atom are present in Nitric acid.
  2. On the product side: 3 Hydrogen, 1 Phosphorous 4 Oxygen atoms are present in Phosphoric acid.
  3. Similarly, Nitrogen dioxide contains 1 Nitrogen 2 Oxygen atoms, and 2 Hydrogen and 1 Oxygen atoms are present in the water molecule.

Step 2: Balancing the reactant molecules: Nitric acid is multiplied by 5.

  1. The chemical equation becomes: P(s)(Phosphorous)+5HNO3(l)(Nitricacid)NO2(g)(Nitrogendioxide)+H3PO4(s)(Phosphoricacid)+H2O(l)

Step 2: Balancing the reactant molecules: Nitrogen dioxide is multiplied by 5.

  1. The chemical equation becomes: P(s)(Phosphorous)+5HNO3(l)(Nitricacid)5NO2(g)(Nitrogendioxide)+H3PO4(s)(Phosphoricacid)+H2O(l)

Now, the equation is balanced i.e. total number of molecules on both sides of the reaction is equal.

  1. On the reactant side: 5 Hydrogen, 5 Nitrogen, and 15 Oxygen atom are present in Nitric acid.
  2. On the product side: 3 Hydrogen, 1 Phosphorous 4 Oxygen atoms are present in Phosphoric acid.
  3. Similarly, Nitrogen dioxide contains 5 Nitrogen, 10 Oxygen atoms, and 2 Hydrogen and 1 Oxygen atoms are present in the water molecule.

Therefore, the balanced equation is as follows:P(s)(Phosphorous)+5HNO3(l)(Nitricacid)5NO2(g)(Nitrogendioxide)+H3PO4(s)(Phosphoricacid)+H2O(l)


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Laboratory method of Preparation
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon