Question

Calculate the moles of base (NaOH) used. Remember, molarity (M) = mol / L

Answer 1

To calculate the moles of NaOH, measure the volume of NaOH in liters, use the molarity to find moles, and then, if required, find the mass by multiplying moles by molar mass of NaOH.

Step-by-step explanation:

To calculate the moles of NaOH base used, follow these steps:

1. First, measure the volume of the NaOH solution used in liters (L). For example, if you have used 12.6 mL, this is equivalent to 0.0126 L (since 1 L = 1000 mL).
2. Use the molarity of the NaOH solution (given as 0.100 M) and multiply it by the volume of the solution to find the moles of NaOH. In our example, moles of NaOH = 0.100 M × 0.0126 L = 0.00126 mol.
3. To find the molar mass of NaOH, sum up the atomic masses of Na (22.990 g/mol), O (15.999 g/mol), and H (1.008 g/mol) which gives us approximately 40.0 g/mol.
4. If you need to calculate the mass of NaOH used, multiply the number of moles by the molar mass. For example, if you have 0.00126 moles of NaOH, the mass would be 0.00126 moles × 40.0 g/mol = 0.0504 g.