WAEC - Chemistry (2017 - No. 34)
If 0.2g of a salt is required to saturate 200\(cm^{3}\) of water at room temperature, what is the solubility of the salt?
0.2\(gdm^{-3}\)
1.0\(gdm^{-3}\)
2.0\(gdm^{-3}\)
5.0\(gdm^{-3}\)
설명
Solubility in \(gdm^{-3}\) = \(\frac{mass of salt in gram}{volume of liquid in dm^{3}}\)
200\(cm^{3}\) = \(\frac{200}{1000} dm^{3} = 0.2dm^{3}\)
Solubility = \(\frac{0.2g}{0.2dm^{3}}\)
= 1.0\(gdm^{-3}\)