no
Sand will not dissolve in water.
A good way to keep someone occupied might be to suggest they try to find out why foot prints disappear from wet sand. They could spend hours trying to find out that the reason the foot prints disappear is because where a foot print is in wet sand fills with water.
Sand is not soluble in any water. It can be suspended in water, but never dissolved.
Sand does not disappear as it is a naturally occurring material that is constantly being created through the erosion and weathering of rocks. However, sand can be moved or displaced due to natural forces such as wind, water, or human activities like construction and mining.
If sand dunes disappear, then that means there isn't enough water to push the dunes up. The water is melting away because of GLOBAL WARMING. Search Global Warming for more results.
If sand were to continue to be carried about by wind, water, and ice it woulld eventually disappear. But what usually happens is that the sand is deposited with other sand grains in an area of relative stillness where it accumulates and can, in time, form into rock. In this case, sandstone.
This happens when the water in the river evaporates due to the heat and dry air in the desert. And the water in the river may sink into the sand. Any river that does not disappear probably has rain and streams running into it.
Filter the sand, salt, water mixture to remove the sand. Then boil the salty water to produce steam (water vapour). Then condense the steam onto a cold surface, fresh water droplets will form on the cold surface. If the steam is captured in a condenser, the steam will return to fresh water.
Warm water can dissolve more easily several possible impurities from the sand.
Sand, or silicon oxide, is fairly inert. It does not dissolve in water. Sand is mostly the same material as glass. So it does not dissolve any faster than glass dissolves in cold water. Hydrofluoric acid is, however, another matter.
Wet sand has more moisture content, which helps to conduct heat away from the body more effectively than dry sand. This removes heat from your feet, making it feel cooler to walk on compared to dry sand, which does not conduct heat as effectively.
Sand heats up faster than water when exposed to sunlight due to its lower specific heat capacity. This means it absorbs heat quickly and feels hot to the touch. In contrast, water has a higher specific heat capacity, so it retains its temperature better and feels cooler compared to the sand on a hot day.