Ignoring protolysis reactions (i.e. proton transfer reaction), specify what ions are present in a solution upon dissolving each of the following substances in water: (c) Na₂Cr₂O₇

Key Concepts

Dissociation of Ionic Compounds

When ionic compounds like Na2Cr2O7 dissolve in water, they dissociate into their constituent ions. This process involves the separation of the positive and negative ions due to the interaction with water molecules, which stabilizes the ions in solution.

Ionic Species in Solution

In the case of Na2Cr2O7, the compound dissociates into sodium ions (Na+) and dichromate ions (Cr2O7^2-). Understanding the specific ions formed is crucial for predicting the chemical behavior of the solution, including its reactivity and potential applications.

Role of Water as a Solvent

Water is often referred to as a 'universal solvent' due to its ability to dissolve many ionic and polar substances. The polar nature of water molecules allows them to surround and solvate ions, facilitating their movement and interaction in solution, which is essential for various chemical processes.