Complete and balance each equation. If no reaction occurs, write 'NO REACTION.' c. CrBr₂(aq) + Na₂CO₃(aq) →

Balancing chemical equations involves ensuring that the number of atoms of each element is the same on both sides of the equation. This is based on the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. To balance an equation, coefficients are adjusted in front of the chemical formulas to achieve equal atom counts.

Understanding the types of chemical reactions is crucial for predicting the products of a reaction. Common types include synthesis, decomposition, single replacement, and double replacement reactions. In the given equation, recognizing that CrBr₂ and Na₂CO₃ may undergo a double replacement reaction helps in determining the potential products and whether a reaction will occur.

Solubility rules help predict whether a compound will dissolve in water or form a precipitate. For example, most bromides are soluble, but some metal bromides may not be. In this case, knowing the solubility of the reactants and potential products is essential to determine if a reaction occurs or if 'NO REACTION' is the appropriate conclusion.