The instrument you would use could be a beaker or a graduated cylinder.
by volume.
No, it depends on the volume of water that can dissolve the salt. If the volume of water is more then it dissolves more salt and the density will be more and if the volume of the water is less then it dissolves less salt and the density will be less.
The amount of salt water you get will depend on the concentration of salt in the water. When you mix salt with water, the salt dissolves into the water to increase its volume slightly. The overall volume of the salt water will be the sum of the volumes of the original salt and water components.
Yes , the volume of water will increase if salt is added , as salt is a solute and water is a solvent. When salt is added , it affects the weight of molecules and the liquid itself.
The volume remain unchanged.
You usually weigh salt to assess how much you have, but you could measure its volume instead of its weight if you wish. It is always sold by weight in my experience, but when cooking, it is usually measured by 'so many level teaspoons '
Since the salt becomes part of the water, and doesn't take up space in the water, the water level doesn't change.
If you are trying to measure concentration of salt in water you would be measuring molarity which is moles / liter. Moles are equal to grams of salt / the MW of salt (and if you mean NaCl then the MW is 58.44 g/mol). Density is a ratio of mass to volume (mass / volume or kg/m^3)
It is not clear what you are asking. Perhaps this will help. !f you take a liter of pure fresh water and weigh it, it will weigh 1000 grams (a kilogram). If you then add 10 grams of salt to the water and stir the salt until it has all dissolved and measure the volume of the now salty water, the volume of the salt water will still measure exactly one liter. However if you weigh the liter of salt water it will weigh 1010 grams. This means that there are now more particles (atoms) occupying the same space - the DENSITY of the salt water is higher than the fresh water.
The salt-water mixture will have the same weight as the sum of the weights of the water and the salt. The water, itself, doesn't gain weight in a strict sense, but the salt-water mixture will be heavier than the plain water. Salt water is denser than fresh water.Yes, the weight of any salts dissolved in water will be additive with the water.weight of salt + weight of water = weight of salt and water in solution
The volume of the solution will NOT be the same after salt is dissolved. In fact, in a saturated solution of NaCl, the volume actually goes DOWN slightly. The explanation is too complex for this discussion. Some salts will increase the volume. You may not notice the change, and it will depend on the amount of salt added. The more salt, the greater will be the change in volume.
When you add table salt (sodium chloride, NaCl) to water, the salt dissolves into ions, Na+ and Cl-. The volume increases by a small factor, but the mass increases by a bigger factor. There are two reasons. One is simply that the NaCl is much denser than water to begin with, mainly because its ions have more mass than the oxygen and hydrogen atoms in the water molecules. Also, the ions bind nicely with the water molecules, so that the volume of the saltwater isn't as big as the water volume plus the salt volume.