Final answer:
Chemical evaluation can be performed on a mixture using methods like titration and gravimetric analysis. These analyses help to determine concentrations and whether a reaction has reached equilibrium or if a particular stoichiometry is present. However, confirming a chemical's identity may require additional information beyond the empirical formula.
Step-by-step explanation:
Yes, chemical evaluation can often be done by testing the mixture as a whole. Methods like titration and gravimetric analysis are used in quantitative chemical analysis to determine the concentration of substances within a mixture, whether to ascertain if a reaction has reached equilibrium or to calculate the stoichiometry of a reaction.
In cases where the empirical formula is found, such as CH2O for glucose, additional information like molar mass is necessary to deduce the molecular formula. However, predicting whether a reaction will take place or not also involves understanding the chemical properties of the reactants. For instance, mixing solutions of sodium chloride and potassium bromide results in no reaction, just a dilution of the original solutions.