3. Weighed quantity of metallic magnesium (0 .0800 g) was dissolved in sulfuric acid, and then was titrated by10.15 ml of EDTA solution in the presence of an ammonia buffer . Calculate the titer of the EDTA solution

To calculate the titer of the EDTA solution, we need to determine the concentration of the EDTA solution using the weighed quantity of metallic magnesium and the volume of EDTA solution used in the titration.<br /><br />Given information:<br />- Weighed quantity of metallic magnesium: 0.0800 g<br />- Volume of EDTA solution used in the titration: 10.15 mL<br /><br />Step 1: Calculate the moles of metallic magnesium.<br />Moles of metallic magnesium = Mass of metallic magnesium / Molar mass of metallic magnesium<br />Molar mass of metallic magnesium = 24.305 g/mol<br />Moles of metallic magnesium = 0.0800 g / 24.305 g/mol = 0.00328 mol<br /><br />Step 2: Calculate the concentration of the EDTA solution.<br />Moles of EDTA = Moles of metallic magnesium (since the reaction is 1:1)<br />Volume of EDTA solution = 10.15 mL = 0.01015 L<br />Concentration of EDTA solution = Moles of EDTA / Volume of EDTA solution<br />Concentration of EDTA solution = 0.00328 mol / 0.01015 L = 0.323 M<br /><br />Therefore, the titer of the EDTA solution is 0.323 M.