It looks like there may be a misunderstanding in your statement. Sand does not dissolve in water. Instead, sand is made up of small particles of minerals, such as quartz, and remains solid when mixed with water.
However, sand can be suspended in water, and if enough water is present, it may create a turbid mixture, but the sand itself remains intact and does not dissolve.
If you meant to inquire about a different process or another substance that dissolves in water, please provide more details!