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Short answer📘 MS-PS1-2🧠 DOK 4
Question:
A science class conducted an experiment in which they mixed vinegar with baking soda in a sealed container. Before the reaction, the students measured the mass of the container with the vinegar and baking soda as 150 grams. After the reaction, they observed the formation of a gas, and the mass of the container was still 150 grams. Analyze and interpret these observations to determine whether a chemical reaction occurred. Provide evidence from the experiment to support your conclusion.
✅ Answer:
A chemical reaction occurred, as evidenced by the formation of a gas when vinegar and baking soda were mixed. The mass remaining constant at 150 grams indicates that the gas produced was trapped within the sealed container, aligning with the law of conservation of mass. The properties of the substances changed, indicating a chemical reaction took place.
💡 Explanation:
- The formation of a gas and the change in properties of the substances from vinegar and baking soda to new products suggest a chemical reaction.
- The law of conservation of mass supports that the total mass remains the same in a closed system, even though the substances' properties change.
Standard: MS-PS1-2 | DOK: 4