Answer to Question #208784 in General Chemistry for KPOPOII

Question

The concentration of sulfate in a solution containing a mixture of sulfuric acid is to be determined. A 25.0 mL portion of the sample is treated with 10.00 mL of 0.0500 M BaCl₂. The resulting precipitate is filtered off and the supernatant solution containing the Ba²⁺ is then titrated with 0.0354 M EDTA which gives an end point at 7.45 mL.

(a) Identify the type of EDTA titration method used.

(b) Calculate the molar concentration of sulfate in the sample.

Single line text.

Answer 1

a) The direct EDTA titration method can be used for determination of the Ba2+ ion concentration.

b) Molar concentration of sulfate =$3.8×10 ^{-3}M$