Question

How would you confirm that a colourless liquid given to you is pure water?

Answer 1

Pure water:-

• Pure water is a tasteless and colourless liquid.
• If a colourless liquid boils at $100°\mathrm{C}\left(373\mathrm{K}\right)$and freezes at $0°\mathrm{C}\left(273\mathrm{K}\right)$ both at 1 atmospheric pressure, we can say that the given liquid is pure water.
• This is because, pure water has a boiling point of $100°\mathrm{C}\left(373\mathrm{K}\right)$and a freezing point of $0°\mathrm{C}\left(273\mathrm{K}\right)$.

Therefore, if a colourless liquid boils has a boiling and melting point of $100°\mathrm{C}\left(373\mathrm{K}\right)$and $0°\mathrm{C}\left(273\mathrm{K}\right)$ at $1\mathrm{atm}$ respectively, then we can say that the liquid given to you is pure water.