<p>One g of a mixture of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><msub><mi>a</mi><mn>2</mn></msub><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub><mo>&#160;</mo><mi>a</mi><mi>n</mi><mi>d</mi><mo>&#160;</mo><mi>N</mi><mi>a</mi><mi>H</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></math>&nbsp;consumes y equivalent of HCl for complete neutralisation. One g of the mixture is strongly heated, then cooled and the residue treated with HCl. How many equivalent of HCl would be required for complete neutralisation?</p>