At 27°C, 58.5g of sodium chloride is present in 250cm\(^3\) of a solution. The solubility of sodium chloride at this temperature is? (molar mass of sodium chloride = 111.0gmol\(^{-1}\))
A. 2.0 moldm\(^{-3}\) B. 0.25 moldm\(^{-3}\) C. 1.0 moldm\(^{-3}\) D. 0.5 moldm\(^{-3}\)
Correct Answer: A
Explanation
Given the Mass of the salt = 58.5g Volume = 250 cm\(^3\) = 0.25 dm\(^3\) Mass concentration = \(\frac{Mass}{Volume}\) = \(\frac{58.5}{0.25}\) = 234 gdm\(^{-3}\) Solubility (in moldm\(^{-3}\) = \(\frac{234}{111} \) = 2.11 moldm\(^{-3}\) \(\approxeq\) 2.0 moldm\(^{-3}\)
