Question

what mass of copper (ii) nitrate is required to prepare a 0.500L of a 0.750mol/L solution?

Answer 1

Answer on Question #49465, Chemistry, Other

**Task:**

What mass of copper (II) nitrate is required to prepare a 0.500 L of a 0.750 mol/L solution?

**Answer:**

$$C_M = \frac{v}{V} \quad v = \frac{m}{M}$$ $$\begin{array}{l} v(CuNO_3) = C_M(CuNO_3) \cdot V(CuNO_3) \\ m(CuNO_3) = v(CuNO_3) \cdot M(CuNO_3) \\ M(CuNO_3) = 125.5 \text{ g/mol} \\ v(CuNO_3) = 0,750 \cdot 0,5 = 0,375 \text{ mol} \\ m(CuNO_3) = 0,375 \cdot 125,5 = 47,06 \text{ g} \end{array}$$

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