Which of the following best describes how a chemical change might be reversed?

• A. By carrying out another chemical reaction that restores the original substances
• B. By simply changing the temperature back to its original value
• C. By dissolving the products in water
• D. By physically separating the products using filtration

Answer: (A)

Verified step by step guidance

1. Understand that a chemical change involves the formation of new substances with different chemical properties from the original substances.
2. Recognize that reversing a chemical change means converting the products back into the original reactants.
3. Recall that physical methods like changing temperature, dissolving in water, or filtration do not change the chemical identity of substances and therefore cannot reverse a chemical change.
4. Identify that reversing a chemical change requires another chemical reaction that transforms the products back into the original substances.
5. Conclude that the best description of reversing a chemical change is by carrying out another chemical reaction that restores the original substances.