Final answer:
The question involves chemistry calculations such as determining molarity, millimoles, and mass of solute in various aqueous solutions.
Step-by-step explanation:
The question pertains to solving problems in aqueous solution reactions, specifically regarding molarity (M) calculations in chemistry. The examples provided are calculations for millimoles of H+ in a hydrochloric acid solution, determining the mass of solute in a potassium bromide solution, calculating molarity of a sodium hydroxide solution, understanding the equivalence point in a titration, and assessing when a chemical reaction does not occur, such as in the case of mixing NaCl and KBr solutions.
One of the ways to calculate molarity is by using the formula M = moles of solute/volume of solution in liters. For example, to calculate the molarity of a solution prepared by dissolving 50.0 g NaOH in enough water to make 250 mL solution, we first convert grams to moles (using the molar mass of NaOH), and then we divide the number of moles by the volume of the solution in liters.