The solid that forms from liquid reactants is called a precipitate.
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The "." in a chemical reaction represents a phase boundary or a physical state change. It separates reactants from products, indicating a change in state, such as from solid to liquid or gas to aqueous.
During a chemical reaction, properties that can change include color, temperature, state of matter (solid, liquid, gas), odor, and the formation of new substances with different chemical properties.
A heterogeneous reaction involves reactants in different phases, such as a gas reacting with a solid catalyst. A homogeneous reaction involves reactants in the same phase, such as a solution where all reactants are dissolved in a liquid.
The substances present after a chemical reaction are called products. These are formed from the rearrangement of atoms from the original reactants. The products can be solid, liquid, or gas depending on the nature of the reaction.
Physically mixing ingredients together will not change the properties of any of the ingredients. Chemical reactions make a new substance, and energy will be absorbed or given off by the reaction.?æ