What's the volume of solution B in calculating its molarity.!!!

The volume of solution B used in calculating its molarity is the volume that was pipetted into the conical flask for the titration.

From the standard experimental procedure for this type of titration, it is typically stated that:

• $25.00 \text{ cm}^3$ of solution B (iodine solution) was pipetted into a conical flask.

Therefore, the volume of solution B used in the calculation is:

$$V_{\text{B}} = 25.00 \text{ cm}^3 = 0.0250 \text{ L}$$

This is the volume used in the denominator when calculating the molarity of solution B:

$$\text{Molarity of B} = \frac{\text{Moles of I}_2}{\text{Volume of solution B (in L)}}$$ $$\text{Molarity of B} = \frac{0.0012165 \text{ mol}}{0.0250 \text{ L}}$$ $$V_{\text{B}} = 25.00 \text{ cm}^3$$