Question

An intravenous saline drip has 9.0 g of sodium chloride per liter of water. By definition, 1 mL = 1 cm³ . Express the salt concentration in kg/m³

Short answer

The concentration of sodium chloride in water is 9 kg/m³

Step-by-step solution

Write the given information

• 1 mL = 1 cm³
• Concentration of sodium chloride in water = 9.0 g/ l

To express the concentration in kg/m3

Note that,

1 g = 10^-3 kg
1 L= 10^-3 m³

Therefore,
$$\begin{gathered} 9g/l=\frac{9\times {10}^{-3}kg}{{10}^{-3}{m}^3} \\ =9kg/m^3 \end{gathered}$$
The concentration of sodium chloride in water is 9 kg/m³