<p>What volume of 0.40 M&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><msub><mi>a</mi><mn>2</mn></msub><msub><mi>S</mi><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></math>&nbsp;would be required to react with the&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>I</mi><mn>2</mn></msub></math>&nbsp;liberated by adding excess of KI to 50 mL of 0.20 M&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>C</mi><mi>u</mi><mi>S</mi><msub><mi>O</mi><mn>4</mn></msub></math>&nbsp;solution?</p>