A paragraph describing the difference between a physical and a chemical change.

Question

Lessons 5-9 will help you understand the difference.
This paragraph should be at least 5 sentences.
Make a table or chart and list 5 physical changes and 5 chemical changes.
Perform a simple action/experiment and record your observations
Include beginning observations and ending observations and the type of change-chemical or physical
This could be as simple as ripping a piece of paper in half, lighting a candle/match, creating a mixture of sand and rocks, baking cookies, mixing baking soda and vinegar, adding vinegar to milk, rolling out playdough, cutting an apple, cooking an egg, or anything else.
Write a conclusion paragraph about your experiment that explains if your experiment showed a physical or chemical change and include the following

What is an experiment that could do the following

Answer 1

Physical and chemical changes are two distinct types of transformations that matter can undergo. A physical change is characterized by a change in the physical properties of a substance without altering its chemical composition. For example, when water freezes into ice or when bread is sliced, the substance remains the same despite the change in shape or state. In contrast, a chemical change involves a transformation that alters the chemical composition of the substance, resulting in the formation of new substances with different properties. An example of a chemical change is the rusting of iron or the combustion of wood, where new products are formed that cannot be simply reversed. Understanding the difference between these two types of changes is crucial in studying various scientific processes and reactions.

| Physical Changes | Chemical Changes | |----------------------------------|------------------------------------| | 1. Ice melting into water | 1. Baking a cake | | 2. Mixing sand and rocks | 2. Rusting of iron | | 3. Cutting an apple | 3. Burning paper | | 4. Ripping a piece of paper | 4. Vinegar and baking soda reaction| | 5. Melting wax from a candle | 5. Cooking an egg |

Experiment: Mixing Baking Soda and Vinegar

Initial Observations:

• I have measured 2 tablespoons of baking soda and 1/2 cup of vinegar.
• The baking soda is a white powder, while the vinegar is a clear liquid with a sharp smell.
• When the vinegar is poured into the bowl with baking soda, it appears as though there are white grains.

Ending Observations:

• Upon mixing, the reaction produces fizzing bubbles and foam that rapidly forms and overflows the bowl.
• The mixture has a different texture and has released gas, causing effervescence.
• The original substances (baking soda and vinegar) are no longer visible as distinct items.

Type of Change: Chemical Change

Conclusion: The experiment of mixing baking soda and vinegar demonstrated a chemical change. Initially, the two substances maintained their distinct identities, but upon combining, they reacted to form new products. The observable fizzing and gas release indicated that a chemical reaction had occurred, which is typical of chemical changes. Unlike physical changes, the original substances could not be recovered, highlighting the creation of new compounds as a result of the reaction. For an experiment that could further illustrate physical and chemical changes, one could explore the process of photosynthesis in plants, where light energy transforms carbon dioxide and water into glucose and oxygen through a chemical change.

Answer 2

can you simplify the first paragraph please?

Answer 3

Sure! Here’s a simplified version of the first paragraph:

Physical and chemical changes are two different ways that substances can change. A physical change happens when a substance changes its appearance or state, but its chemical makeup stays the same. For example, when ice melts into water or when you cut an apple, the substance itself does not change. A chemical change, on the other hand, occurs when a substance transforms into a new one with different properties. This can happen during reactions like rust forming on iron or wood burning. Understanding these differences helps us learn more about how matter behaves.

Answer 4

can you change and simplify the word "effervescence."

Answer 5

Certainly! Instead of "effervescence," we can use the phrase "bubbling action." Here’s how the relevant part of the experiment conclusion would read:

Ending Observations:

• Upon mixing, the reaction produces fizzing bubbles and foam that rapidly forms and overflows the bowl.
• The mixture has a different texture and has released gas, causing bubbling action.
• The original substances (baking soda and vinegar) are no longer visible as distinct items.

If you have any more requests or need further changes, feel free to ask!

Answer 6

what would be a claim for the experiment

Answer 7

A suitable claim for the experiment of mixing baking soda and vinegar could be:

Claim: The reaction between baking soda and vinegar is a chemical change because it produces new substances (carbon dioxide gas and water) and exhibits observable signs of a reaction, such as bubbling and fizzing, that indicate a transformation of the original materials into different products.

Answer 8

whats some evidence from that?

Answer 9

Here are points of evidence to support the claim that mixing baking soda and vinegar is a chemical change:

1. Observable Reaction: When baking soda (a solid) is added to vinegar (a liquid), a noticeable reaction occurs immediately, resulting in bubbling and fizzing. This indicates that a new gas is being produced.

2. Gas Production: The formation of bubbles is due to the release of carbon dioxide gas (CO2), which is a new substance not present in the original reactants. This is a clear indicator of a chemical reaction.

3. Change in Properties: The mixture of baking soda and vinegar creates a foam that has different physical properties (such as texture and appearance) compared to the original substances. This change confirms that new substances are formed.

4. Irreversibility: Once the reaction has occurred, it is not possible to separate the products back into baking soda and vinegar. This change is not just a physical alteration but is instead a transformation into new substances.

5. Chemical Equation: The chemical reaction can be represented by the equation:

   \[ \text{NaHCO}_3 (s) + \text{CH}_3\text{COOH} (l) \rightarrow \text{CO}_2 (g) + \text{H}_2\text{O} (l) + \text{NaCH}_3\text{COO} (aq) \]

   This equation illustrates that reactants combine to form new products, further supporting the claim that a chemical change has occurred.

These pieces of evidence help to clearly demonstrate that the reaction between baking soda and vinegar is indeed a chemical change.

Answer 10

can you make just a short sentence with the evidence

Answer 11

Sure! Here’s a concise sentence summarizing the evidence:

The reaction between baking soda and vinegar produces bubbling carbon dioxide gas, creates new substances with different properties, and cannot be reversed, indicating it is a chemical change.