What happens is it turns into a liquid/solid called ooblek but it all depends on how much you mix togeher.
~The cornstarch and water mixture acts like a solid sometimes and a liquid at other times. A mixture of cornstarch and water make what is known as a suspension. When you squeeze a Cornstarch Suspension it really feels like a solid because its molecules line up. But it looks like a liquid and acts like a liquid when no one is pressing on it because the molecules relax. When you punch the cornstarch, you force the cornstarch molecules closer together. The impact of this force traps the water between the starch chains to form a semi-rigid structure. When the pressure is released, the cornstarch flows to a liquid again. The "goo" that forms when mixing the two substances together acts very similar to quicksand.
the mixture turns black
Yes, you can separate cornstarch from water by letting the mixture sit until the cornstarch settles to the bottom, then carefully pouring off the water. You could also use centrifugation to separate the cornstarch by spinning the mixture at high speed to force the cornstarch to the bottom of the container.
Water become gaseous.
will be hot
No, mixing cornstarch with water is not a chemical reaction. It is a physical change. The cornstarch particles disperse throughout the water, but no new substances are formed.
Yes, cornstarch can dissolve in water to form a mixture called a suspension. When stirred, the cornstarch particles disperse in the water but do not fully dissolve like sugar or salt would.
Cornstarch and water mixed.
with cornstarch and water
Evaperates
Well, there is no chemical reaction, really, since the cornstarch still remains cornstarch. (and if you dry it, it becomes cornstarch again) It's just that the cornstarch lightly bonds to the water which then lightly bonds to other cornstarch, creating a net-like substance. This net is easily broken and made, thus increasing the viscosity of the fluid and adding some other interesting properties to it as well.
Cornstarch does not dissolve in oil; rather, it is hydrophilic and dissolves in water. When mixed with oil, cornstarch may form a suspension or paste, but it won't dissolve like it does in water. The two substances have different polarities, which prevents cornstarch from fully integrating into the oil.
When cornstarch dissolves in water, it undergoes a process that is generally considered endothermic. This means that it absorbs heat from the surroundings, which can lead to a slight cooling effect in the mixture. The interaction between cornstarch molecules and water requires energy, resulting in this heat absorption. Therefore, the dissolution of cornstarch in water is characterized as endothermic.