A laboratory procedure calls for 250.0 mL of 0.1000 M aqueous

CHEMISTRY · Multi-part · CBSE · Chemistry · Acids, Bases and Salts · Acids, Bases and Salts

Problem

\text{CuSO}_{4}

. Solid copper(II) sulfate is supplied as the pentahydrate,

\text{CuSO}_{4}\cdot5\text{H}_{2}\text{O}

. Under humid conditions it can further absorb water to form

\text{CuSO}_{4}\cdot7\text{H}_{2}\text{O}

. (a) Determine the minimum mass of

\text{CuSO}_{4}\cdot5\text{H}_{2}\text{O}

that must be weighed to prepare 250.0 mL of 0.1000 M

\text{CuSO}_{4}

solution. (b) If the hydrate has unintentionally absorbed additional water so that the solid is now

\text{CuSO}_{4}\cdot7\text{H}_{2}\text{O}

, calculate the mass of this new hydrate that must be weighed to deliver the same number of moles of

\text{CuSO}_{4}

required in part (a).