Final answer:
To identify the concentration of the base NaOH, calculate the moles of HCl using its molarity and volume, assume equal moles of NaOH are needed for neutralization, and then divide by the volume of NaOH used.
Step-by-step explanation:
When identifying the concentration of the base in a neutralization reaction, you can use the information provided about the volume and concentration of the acid (HCl) and the volume of NaOH that neutralizes it. You would use the concept of molarity and the neutralization equation which states that the number of moles of acid equals the number of moles of base in a complete neutralization.
To find the concentration of NaOH, you must first calculate the moles of HCl using its concentration and volume, then assuming stoichiometric neutralization, use the moles of HCl to determine the moles of NaOH. Finally, divide the moles of NaOH by its volume in liters to find its concentration.
The formula for molarity (M) is M = moles of solute / volume of solution in liters. Therefore, the concentration of the base (in molarity, M) can be found as follows:
- Calculate moles of HCl: moles = 0.1234 M * 25.00 mL * (1 L / 1000 mL).
- Since the reaction is 1:1, the moles of HCl equal the moles of NaOH.
- Calculate the concentration of NaOH: concentration = moles of NaOH / 0.02345 L.