Question

explain the steps you would follow to make 500mL of a 0.5 mol/ L solution of sodium chloride (NaCl) in the lab.

Answer 1

explain the steps you would follow to make 500mL of a 0.5 mol/L solution of sodium chloride (NaCl) in the lab.

**Answer:**

**The first step.**

To determine the mass of NaCl:

$$\mathrm{m}(\mathrm{NaCl}) = \mathrm{V} \cdot \mathrm{C} \cdot \mathrm{M}(\mathrm{NaCl}) = 0.5(\mathrm{L}) \cdot 0.5(\mathrm{mol} / \mathrm{L}) \cdot 58.5(\mathrm{g} / \mathrm{mol}) = 14.625\ \mathrm{g}$$

**The second step.**

14.625 g NaCl is weighed, and put this NaCl in the volumetric flask measures 500 mL.

**The third step.**

NaCl is dissolved in less water.

**The fourth step.**

Fill the flask to the mark.