You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
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To determine the molar mass of the acid, you can follow these steps:
Step 1: Calculate the number of moles of NaOH used.
To do this, you first need to find the number of moles of NaOH using its molarity and volume. The formula to calculate the number of moles is:
Number of moles = Molarity × Volume (in liters)
Given:
Molarity of NaOH (M1) = 0.1024 M
Volume of NaOH (V1) = 23.80 mL = 0.02380 L
Number of moles of NaOH = 0.1024 M × 0.02380 L
Step 2: Calculate the number of moles of acid.
Since the balanced equation between NaOH and the acid is 1:1, the number of moles of the acid is the same as the number of moles of NaOH.
Number of moles of acid = Number of moles of NaOH
Step 3: Calculate the mass of the acid.
To calculate the mass of the acid, you can use the formula:
Mass = Number of moles × Molar mass
Given:
Mass of acid (m) = 0.213 g
Molar mass of the acid = Mass of acid / Number of moles of acid
Molar mass of the acid = 0.213 g / (Number of moles of NaOH)
With the above calculations, you'll obtain the molar mass of the acid.