Answer
You could measure its mass and volume to compare its density with water's density.
Once it is confirmed it's water, you could measure its boiling or freezing point and compare it with water's; a lower freezing point or a higher boiling point means there is salt dissolved in the water.
Work Step by Step
You could measure its mass and volume to compare its density with water's density.
Once it is confirmed it's water, you could measure its boiling or freezing point and compare it with water's; a lower freezing point or a higher boiling point means there is salt dissolved in the water.
