Which of the following is not true of catalysts? O They speed up reactions. O They are unchanged by the reaction they catalyze. They become part of the final product. They do not change the normal position of a chemical equilibrium.

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### Understanding Catalysts: What is True and Not True

**Question:**

Which of the following is **not** true of catalysts?

1. They speed up reactions.
2. They are unchanged by the reaction they catalyze.
3. They become part of the final product.
4. They do not change the normal position of a chemical equilibrium.

**Detailed Explanation:**

**Option 1: They speed up reactions.**
- *True.* Catalysts indeed speed up the rate of chemical reactions without being consumed in the process. They work by lowering the activation energy required for the reaction to occur.

**Option 2: They are unchanged by the reaction they catalyze.**
- *True.* Catalysts do not undergo any permanent chemical change themselves during the reaction. They can be used repeatedly to catalyze multiple reactions.

**Option 3: They become part of the final product.**
- *Not True.* This statement is incorrect. Catalysts do not become part of the final product. They facilitate the reaction and remain intact to be used again.

**Option 4: They do not change the normal position of a chemical equilibrium.**
- *True.* Catalysts do not alter the position of equilibrium in a chemical reaction. They only help the system to reach equilibrium faster.

In conclusion, the incorrect statement about catalysts is that ***they become part of the final product.*** Catalysts remain unchanged after the reaction and are not included in the products.
Transcribed Image Text:### Understanding Catalysts: What is True and Not True **Question:** Which of the following is **not** true of catalysts? 1. They speed up reactions. 2. They are unchanged by the reaction they catalyze. 3. They become part of the final product. 4. They do not change the normal position of a chemical equilibrium. **Detailed Explanation:** **Option 1: They speed up reactions.** - *True.* Catalysts indeed speed up the rate of chemical reactions without being consumed in the process. They work by lowering the activation energy required for the reaction to occur. **Option 2: They are unchanged by the reaction they catalyze.** - *True.* Catalysts do not undergo any permanent chemical change themselves during the reaction. They can be used repeatedly to catalyze multiple reactions. **Option 3: They become part of the final product.** - *Not True.* This statement is incorrect. Catalysts do not become part of the final product. They facilitate the reaction and remain intact to be used again. **Option 4: They do not change the normal position of a chemical equilibrium.** - *True.* Catalysts do not alter the position of equilibrium in a chemical reaction. They only help the system to reach equilibrium faster. In conclusion, the incorrect statement about catalysts is that ***they become part of the final product.*** Catalysts remain unchanged after the reaction and are not included in the products.
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