Question

is the reaction of silver nitrate with HCI a physical change or chemical change, right 2-3 sentences on why you think that and describe why you chose that type of change, put the definition of the answer you choose , the start/end products of the answer you choose, the start/end appearance of your answer, and the particular evidence observe to indicate your answer

Answer 1

The reaction of silver nitrate (AgNO₃) with hydrochloric acid (HCl) is a chemical change. This is because a new substance, silver chloride (AgCl), is formed as a result of the reaction. The definition of a chemical change is a process that involves the transformation of substances into one or more different substances, often accompanied by energy changes and observable effects.

Starting products: Silver nitrate (AgNO₃) and hydrochloric acid (HCl).
End products: Silver chloride (AgCl) and nitric acid (HNO₃).
Starting appearance: Silver nitrate is a colorless crystal or solution, and hydrochloric acid is a clear, colorless liquid.
End appearance: Silver chloride is a white precipitate that forms in the solution, while nitric acid remains in solution.

The observable evidence of this chemical change is the formation of the white precipitate of silver chloride, which indicates a new substance has been created.

Answer 2

thanks but now do that but the reaction with a Copper penny reacting with Nitric acid

Answer 3

The reaction of a copper penny with nitric acid (HNO₃) is a chemical change. This is because the copper (Cu) reacts with nitric acid to produce new substances, including copper nitrate (Cu(NO₃)₂), nitrogen dioxide (NO₂), and water (H₂O). A chemical change is defined as a process that results in the transformation of substances into one or more different substances, often characterized by a change in properties and the formation of new materials.

Starting products: Copper (Cu) penny and nitric acid (HNO₃).
End products: Copper nitrate (Cu(NO₃)₂), nitrogen dioxide (NO₂), and water (H₂O).
Starting appearance: The copper penny is initially a reddish-brown color, and nitric acid is a clear, colorless liquid.
End appearance: The solution becomes blue due to the formation of copper nitrate, and reddish-brown nitrogen dioxide gas is often observed bubbling and being released, which has a distinct brown color.

The observable evidence of this chemical change includes the color change of the solution to blue and the production of brown nitrogen dioxide gas, both indicating that new substances have formed.

Answer 4

do the same but for freezing a cup of water

Answer 5

The process of freezing a cup of water is a physical change. This is because the water (H₂O) changes from a liquid state to a solid state (ice) without altering its chemical composition. A physical change is defined as a change that affects one or more physical properties of a substance without changing its chemical identity.

Starting product: Liquid water (H₂O).
End product: Solid ice (H₂O).
Starting appearance: The water is typically clear and has a liquid appearance.
End appearance: The water transforms into solid ice, which is usually opaque and can be white or clear, depending on the presence of air bubbles.

The observable evidence of this physical change includes the temperature drop of the water, the formation of ice, and the change in texture and state from liquid to solid, all of which indicate the water has undergone a physical transformation without losing its chemical identity.

Answer 6

do the same thing but a apple aging

Answer 7

The aging of an apple is considered a chemical change. As an apple ages, it undergoes various biochemical processes, including oxidation and the breakdown of sugars, which lead to changes in its flavor, texture, and appearance. A chemical change is defined as a transformation that results in the production of new substances with different properties.

Starting product: Fresh apple (C₆H₁₂O₆ and other organic compounds).
End product: Deteriorated apple with byproducts from decomposition (including acids, ethanol, and other compounds).
Starting appearance: The fresh apple is typically firm, vibrant in color, and has a crisp texture.
End appearance: The aging apple becomes soft, may turn brown due to oxidation, and often develops a wrinkled or shriveled appearance.

Observable evidence of this chemical change includes the change in texture from firm to soft, the browning of the apple’s flesh (indicating oxidation), the development of off-flavors and smells, and potential mold growth—all indicating that the apple has undergone chemical transformations as it ages.

Answer 8

same thing but for a origami owl I guess

Answer 9

Creating an origami owl is considered a physical change. This is because the process of folding paper transforms it into a specific shape without altering its chemical composition. A physical change is defined as a change that affects one or more physical properties of a substance without changing its chemical identity.

Starting product: A flat sheet of paper (typically cellulose fibers).
End product: A three-dimensional origami owl made from the same paper.
Starting appearance: The sheet of paper is flat and can be any color or pattern.
End appearance: The origami owl has a defined shape with folds and creases, retaining the same color and texture of the original paper.

Observable evidence of this physical change includes the transformation from a flat sheet to a structured figure and visible creases or folds in the paper. While the paper maintains its chemical properties, its form and usability have been altered through the folding process.