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Chapter 22: Problem 82

What is the anhydride for each of the following acids: (a) \(\mathrm{H}_{2} \mathrm{SO}_{4},(\mathbf{b}) \mathrm{HClO}_{3},(\mathbf{c}) \mathrm{HNO}_{2},(\mathbf{d}) \mathrm{H}_{2} \mathrm{CO}_{3},(\mathbf{e}) \mathrm{H}_{3} \mathrm{PO}_{4} ?\)

Short Answer

Expert verified
The anhydrides for the given acids are: (a) H2SO4: \( \mathrm{SO}_{3} \), (b) HClO3: \( \mathrm{Cl}_{2} \mathrm{O}_{3} \), (c) HNO2: \( \mathrm{N}_{2} \mathrm{O}_{3} \), (d) H2CO3: \( \mathrm{CO}_{2} \), and (e) H3PO4: \( \mathrm{P}_{2} \mathrm{O}_{5} \).

Step by step solution

01

Identify the water molecule in each acid

For each of the given acids, we need to find the water molecule (H2O) that can be removed to form the anhydride. A good way to approach this is to focus on the hydrogens (H) that can combine with oxygen (O) to form H2O.
02

Remove water molecule and rewrite the anhydride formula

For each given acid, remove the H2O molecule and rewrite the chemical formula for the anhydride. Here's the solution for each of the acids: (a) H2SO4 Anhydride: \( \mathrm{SO}_{3} \) (removing H2O from the formula) (b) HClO3 Anhydride: \( \mathrm{Cl}_{2} \mathrm{O}_{3} \) (removing H2O from the formula) (c) HNO2 Anhydride: \( \mathrm{N}_{2} \mathrm{O}_{3} \) (removing H2O from the formula) (d) H2CO3 Anhydride: \( \mathrm{CO}_{2} \) (removing H2O from the formula) (e) H3PO4 Anhydride: \( \mathrm{P}_{2} \mathrm{O}_{5} \) (removing 1/2 H2O per phosphorus atom)
03

State the anhydrides of the given acids

The anhydrides for each of the given acids are: (a) H2SO4: \( \mathrm{SO}_{3} \) (b) HClO3: \( \mathrm{Cl}_{2} \mathrm{O}_{3} \) (c) HNO2: \( \mathrm{N}_{2} \mathrm{O}_{3} \) (d) H2CO3: \( \mathrm{CO}_{2} \) (e) H3PO4: \( \mathrm{P}_{2} \mathrm{O}_{5} \)

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