Question

crushed chalk or whole chalk
chemistry
pre - lab questions

1. what is this investigation about?
2. what is a chemical reaction? what is one clue that a chemical reaction has occurred?
3. what are the reactants and products in this reaction?
4. chemically, what is vinegar?
5. what is filtration used for? list two everyday examples of filtration.

Explanation:

1. This investigation likely focuses on the reaction between chalk (calcium carbonate) and an acid (possibly vinegar).
2. A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. A clue of a chemical reaction is the production of gas (e.g., bubbles), color - change, or temperature - change.
3. Without specific reaction details, in a general chalk - acid reaction, reactants could be calcium carbonate and acid, and products could be calcium salt, water, and carbon dioxide.
4. Chemically, vinegar is an aqueous solution of acetic acid ($CH_3COOH$) and water, usually with small amounts of other substances.
5. Filtration is used to separate solids from liquids or gases. Everyday examples include using a coffee filter to separate coffee grounds from brewed coffee and using a tea - strainer to separate tea leaves from tea.

Answer:

1. Likely the reaction between chalk and an acid.
2. A chemical reaction is a process of substance transformation. Clue: Gas production.
3. Reactants: Calcium carbonate and acid. Products: Calcium salt, water, carbon dioxide (general case).
4. Aqueous solution of acetic acid and water.
5. Separate solids from liquids/gases. Examples: Coffee - making, tea - straining.