What does the equation 'MV = MV' represent in a titration?

The equation 'MV = MV' represents the relationship between the molarity (M) and volume (V) of two solutions that are involved in a titration process. In a titration, one solution (the titrant) is added to another solution (the analyte) to reach a point of neutralization or equivalence.

In this context, the molarity represents the concentration of the solutions, and the volume is the amount used in the reaction. According to this formula, the product of the molarity and volume for the first solution equals the product of the molarity and volume for the second solution. This relationship allows chemists to calculate how much of one solution is required to completely react with a specific volume of another solution, thus enabling accurate measurements and determinations of concentration in quantitative analysis.

This understanding is fundamental in titrations where precise concentration calculations are necessary for the determination of unknown solutions, making option B the correct choice.