# Does salt weigh as much as sand?

For example, would a bowl of salt weigh roughly the same as a bowl of sand?

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The density of sodium chloride is 2.16 g/cm^3 whereas that of quartz -- the dominant component of sand -- is 2.65 g/cm^3. A solid piece of quartz therefore weighs >20% more than a solid piece of salt of the same volume. With a powder, one must take account of the void space. As salt crystals are usually cubes and sand grains are more nearly spherical, this may be very different. Typical void space in spheres is about 30% -- reducing the effective density to 1.86 g/cm^3. If void space in the cubes was about 15%, they would have effectively the same density and if less salt would have a greater density. In theory cubes could be arranged to have essentially zero porosity but in a bowl of salt that is clearly not the case. My guess is that the sand would weight more but something like an excess of 10-15%.

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• Assuming that you are packing the same number of grains and that the grains are the same size...the sand would weigh more.

Sand (assuming it is made up of the mineral quartz) has a specific gravity of 2.65 and halite (salt) has a specific gravity of 2.16. Specific gravity is a measure of relative density - since the quartz sand has a greater relative density than the salt, it would weight more for a given volume (the bowl).

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• If you mean silica-based or quartz-based sand, then the sand will weigh more than the same volume of sodium-chloride salt.

Sand is a textural term and is defined by a specific range of grain sizes. One could have sand composed of salt grains (like in a salt shaker) or iron particles, or gypsum particles (like White Sands National Monument). All these three sand types will weigh different for the same volume of sand.

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• A bowl is not a good measure. But a pound of salt and a pound of sand would weigh the same; as would a pound of salt and a pound of feathers.

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• For something like a bowl of the stuff, you need the "bulk" density, not the density of the individual grains.

Salt, Fine Table = 1380 kg/m^3

Sand (Dry) = 1706 kg/m^3 <== about 24% heavier than the salt.

Sand (Fine) = 2000 kg/m^3

1000 kg = 1 metric ton.

1 m^3 = 1 meter x 1 meter x 1 meter (about 1 yard x 1 yard x 1 yard, plus 31%)

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• good question, you got mw wanting to know now, But I think its sand

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• SALT IS LIGHTER

salt disolves in water

sand sinks

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• Try it and see. I think it would depend on the size of the granules.. but it would be close I think.. let us know

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• challenging aspect. try searching at yahoo or google. it could help!

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