Study Guides/Chemistry/Molecular Weight of HNO3
Study Guide · Chemistry

Molecular Weight of HNO₃ (Nitric Acid)

HNO₃ (Nitric Acid) is one of the most important strong acids in chemistry. Calculating its molecular mass is a common exam question.

Question (Click to Flip)

What is the basicity of HNO₃?

Answer

HNO₃ has a basicity of 1 — it donates exactly one H⁺ ion per molecule when it dissociates in water.

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Key Facts

HNO₃ is manufactured industrially using the Ostwald Process. It is used to make fertilisers (ammonium nitrate) and explosives (TNT).

Step-by-Step Calculation

Formula: HNO₃

Atomic masses:

  • H (Hydrogen) = 1 g/mol
  • N (Nitrogen) = 14 g/mol
  • O (Oxygen) = 16 g/mol

Count atoms:

  • H: 1 × 1 = 1
  • N: 1 × 14 = 14
  • O: 3 × 16 = 48

Total = 1 + 14 + 48 = 63 g/mol

Questions and Answers

What is the basicity of HNO₃?+

HNO₃ has a basicity of **1** — it donates exactly one H⁺ ion per molecule when it dissociates in water.

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