Plaster of Paris is a substance that becomes hard when mixed with water. It is commonly used in construction and Arts and Crafts for making molds and sculptures.
it is used for concrete because it dry into a hard substance and when mixed with the right substances, can dry under water
One common substance used to make hard water soft and potable is sodium carbonate, also known as soda ash or washing soda. It works by reacting with the calcium and magnesium ions in the water to form insoluble compounds that can be easily removed, resulting in softer water.
sand because when u see in microscope its a little hard shells
The most common constituents that make water hard are magnesium and calcium ions, since these form only very slightly soluble salts with anions in soap. The other alkaline earth metal cations have the same effect, but occur less commonly.
The substance likely forms ionic bonds because ionic compounds are typically water-soluble, conductive in solution, and can form hard structures. These bonds form between a metal and a non-metal, resulting in the transfer of electrons from one atom to another.
it is used for concrete because it dry into a hard substance and when mixed with the right substances, can dry under water
This wasn't very hard, the answer is :CHEMISTRY!
you boil it in boiling water
Ice block
The water was evaporated.
it becomes soft
Yes, when water changes state, it can appear and feel different but it remains the same substance. For example, when water freezes into ice, it becomes solid and hard, while when it boils into steam, it becomes a gas. Despite these changes, the fundamental chemical composition of water (H2O) remains the same.
If you freeze water(liquid) it becomes ice(hard) its a liquid in a solid form
salt
It is usually called freezing, but can also be called solidification. It occurs when the temperature goes below the freezing temperature of a substance and that substance solidifies, or becomes hard.
Plaster of Paris is formed from gypsum. The gypsum is heated to 150 decrees Celsius and becomes a dry powder. When this powder is mixed with water it re-forms into a paste and eventually hardens into a solid. The powder mixed with water is held together by hydrogen bonds in the water molecules. This is a week bond that is easily broken. When Plaster of Paris and water are mixed together they undergo a chemical change. The particles rearrange to make a completely new substance. When plaster of Paris and water are mixed together the mixture becomes warm releasing energy in the form of heat therefore undergoing a chemical change.
Freezing. The cold slows down the particles in the water and it becomes hard