Question

Mass of antacid in sample: 1.5004 g

Antacid tablet: 1.6080 g

Composition of antacid:

Aluminum hydroxide: 160 mg

Magnesium carbonate: 105 mg

Molarity of EDTA: 0.01000 M

Pipet a 10.00 mL aliquot of the antacid sample solution to a 125 mL of Erlenmeyer flask followed by adding about 10 mL of the bicarbonate-carbonate buffer solution (pH 10.0 ± 0.1). Add about 3 mL of triethanolamine (TEA) and swirl the mixture for 2 min. to enhance the formation of Al-triethanolamine complex and to mask the Al-EDTA complexation. Set the solution aside until the turbid solution becomes mostly clear for easy observation of endpoint. Add 5 drops of Calmagite indicator and mix well. The solution should appear wine red color in this moment.Direct-titrate the solution with standard EDTA solution until the color changes to pure blue at the endpoint. The used volume of EDTA was 6.00ml. Hence, in this protocol quick titration will give an ideal result.

Compute the millimoles and weights of magnesium in the antacid sample solution and in the tablet.

Answer 1

I think you might provide the procedure of the 10 mL solution preparation.

However, I answered the question with the provided information:

If V mL=10 mL (i.e. no stock solution involved uou will get the same result as solved)