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When mixing 2 or more substances together, evidence that a chemical change occurred would NOT include
Bot
answered1 year ago
Explain Bot
answered8 months ago
When mixing 2 or more substances together, evidence that a chemical change occurred would NOT include:
1. Change in temperature: The temperature may change when substances are mixed due to heat transfer or from an exothermic or endothermic reaction. However, it alone is not enough to confirm a chemical change.
2. Change in color: While a change in color can sometimes indicate a chemical change, it can also occur due to other reasons such as the mixing of pigments or the formation of a solution. Therefore, it is not a definitive evidence on its own.
3. Change in odor: A change in odor can sometimes indicate that a chemical reaction has taken place, but it can also be due to the evaporation of volatile substances or the release of gases from the mixture. Hence, it is not conclusive evidence by itself.
4. Change in volume: The change in volume alone is not a reliable indicator of a chemical change. It could occur due to differences in the densities of the substances being mixed or changes in the physical state of the substances.
5. Formation of a precipitate: The formation of a precipitate, which is an insoluble solid, can indicate a chemical change in some cases. However, it is not always a definitive evidence, as the formation of a precipitate can also occur in some physical reactions or mixtures.
To determine if a chemical change has occurred, it is essential to look for conclusive evidence such as the production or absorption of gas, the evolution of heat or light, the formation of a new substance with different properties, or a change in the chemical composition or structure of the substances being mixed.
Step-by-Step Bot
answered8 months ago
When mixing 2 or more substances together, evidence that a chemical change occurred would NOT include:
1. No change in color: If the color of the mixture remains the same as the original substances, it suggests that no chemical reaction took place. However, it is important to note that some chemical reactions may not always exhibit a noticeable change in color.
2. No change in temperature: If there is no noticeable change in temperature during or after mixing the substances, it suggests that there may not have been a chemical reaction. However, it is important to note that some reactions can be endothermic or exothermic, which means they can release or absorb heat respectively.
3. No formation of a precipitate: A precipitate is a solid that forms when two or more solutions are mixed together. If no solid forms and the solution remains homogenous, it suggests that there may not have been a chemical reaction. However, it is important to note that not all chemical reactions result in the formation of a precipitate.
4. No production of gas: If there are no bubbles or gas evolution observed during or after mixing the substances, it suggests that there may not have been a chemical reaction. However, some reactions may be slow or not produce visible gas bubbles.
5. No change in odor: If there is no noticeable change in odor during or after mixing the substances, it suggests that there may not have been a chemical reaction. However, certain reactions may not always result in a significant change in smell or may be odorless.
It is important to consider that these factors alone may not provide conclusive evidence of a chemical change. Additional tests, such as analyzing the composition of the substances before and after mixing, may be required for a more accurate determination.