Which procedure could be used to demonstrate that matter is conserved during chemical change or reaction?
One common procedure that could be used to demonstrate the conservation of matter during a chemical change or reaction is called "mass balance". This involves weighing the various reactants before the reaction takes place, and then weighing the products after the reaction is complete. By comparing the mass of the reactants to the mass of the products, any difference would demonstrate that matter is not conserved. However, if the masses are found to be equal, it would support the principle of conservation of matter.
One possible procedure that can be used to demonstrate the conservation of matter during a chemical change or reaction is the "mass balance" method. Here are the steps involved in this procedure:
Step 1: Set up the experiment
- Gather all the necessary equipment, such as a balance, a container (e.g., beaker), and chemicals to be used in the reaction.
- Place the container on the balance and record the initial mass.
Step 2: Perform the chemical reaction
- Add the reactants to the container and allow the reaction to occur.
- Ensure that the reaction proceeds to completion by providing sufficient time or adding a catalyst if needed.
Step 3: Monitor the mass change
- After the reaction is complete, reweigh the container and record the final mass.
- Calculate the mass difference between the initial and final measurements.
Step 4: Analyze the results
- Compare the initial and final masses obtained from the experiment. If the mass difference is negligible or within experimental error, it demonstrates the conservation of matter.
- If there is a significant mass difference, it suggests that matter has not been conserved, indicating the possibility of a measurement error or an incomplete reaction.
By carefully following these steps, the mass balance method can provide evidence that matter is conserved during a chemical change or reaction.
One procedure that could be used to demonstrate that matter is conserved during a chemical change or reaction is by performing a mass balance. To do this, you would need to carefully measure the mass of all the substances involved before and after the reaction.
Here's how you could carry out a mass balance:
1. Start by measuring the mass of the reactants (the substances that will undergo the chemical change). This could involve weighing out solid substances or measuring the volume of liquid substances to calculate their mass.
2. Mix the reactants and allow the chemical reaction to occur. During the reaction, you might observe physical changes such as color changes, gas production, or temperature changes.
3. Once the reaction has completed, measure the mass of the products (the substances formed after the reaction) in the same way you measured the initial mass of the reactants.
4. Compare the total mass of the reactants to the total mass of the products. If matter is conserved during the reaction, the mass of the reactants should be equal to the mass of the products.
If the mass of the reactants and products is found to be equal, it provides evidence that matter is conserved during the chemical change or reaction. This supports the law of conservation of mass, which states that matter cannot be created or destroyed, only transformed from one form to another. Keep in mind that there might be small discrepancies due to measurement errors or the inclusion of impurities in the reactants.