Who received the Nobel Prize in 1901 for ‘recognition of the extraordinary services rendered by the discovery of the laws of chemical dynamics and osmotic pressure in solutions’?

The correct answer is Jacobus Henricus van 't Hoff.

Let's walk through the reasoning step by step to understand why this is the correct answer.

Step 1: Understanding the Nobel Prize in Chemistry — 1901

The Nobel Prize in Chemistry was first awarded in 1901, the very first year Nobel Prizes were given out. The citation for the 1901 Chemistry prize reads exactly as stated in the question: "recognition of the extraordinary services rendered by the discovery of the laws of chemical dynamics and osmotic pressure in solutions."

Step 2: Who was Jacobus Henricus van 't Hoff?

Jacobus Henricus van 't Hoff (1852–1911) was a Dutch physical chemist and one of the founding figures of physical chemistry and stereochemistry. His groundbreaking contributions include:

• Laws of Chemical Dynamics: He developed mathematical relationships describing how chemical reactions proceed over time and how equilibrium is established — essentially laying the groundwork for chemical kinetics and thermodynamics of reactions.

• Osmotic Pressure in Solutions: He formulated the van 't Hoff Law of Osmotic Pressure, which states that osmotic pressure (π) of a dilute solution is analogous to the pressure of an ideal gas. The relationship is expressed as:

\pi =iMRT

Where:

• \pi = osmotic pressure
• i = van 't Hoff factor (accounting for dissociation of solute)
• M = molarity of the solution
• R = universal gas constant
• T = absolute temperature in Kelvin

Step 3: Eliminating the Other Options

• Hermann Emil Fischer — Also a Nobel laureate, but he received the Nobel Prize in Chemistry in 1902, for his work on sugar and purine syntheses. Not 1901.

• Svante August Arrhenius — A Swedish chemist famous for his theory of electrolytic dissociation. He received the Nobel Prize in Chemistry in 1903. Not 1901.

• Henri Moissan — A French chemist who isolated fluorine and invented the electric arc furnace. He received the Nobel Prize in Chemistry in 1906. Not 1901.

Step 4: Conclusion

Jacobus Henricus van 't Hoff was awarded the first-ever Nobel Prize in Chemistry in 1901 for his pioneering work in establishing the laws governing chemical dynamics (reaction rates and equilibria) and osmotic pressure in solutions. His work unified the behavior of dissolved substances with the principles of thermodynamics, revolutionizing physical chemistry as a discipline.