Which procedure could be used to demonstrate that matter is conserved during a chemical change or reaction?
1. Find the mass of a stick of butter. Heat the butter until it melts. Find the mass of the melted butter.
2. Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
3. Find the mass of a piece of paper. Teat the paper into smaller pieces. Find the mass of the pieces.
4. find the mass of a log. Burn the log until it turns to ash and smoke. Find the mass of the ash.
2. Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
The correct procedure that could be used to demonstrate that matter is conserved during a chemical change or reaction is:
2. Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
In this experiment, weighing the reactants before the reaction and the products after the reaction will allow you to determine if matter is conserved. If the mass of the reactants is equal to the mass of the products, it demonstrates that matter is conserved during the chemical change or reaction.
To demonstrate that matter is conserved during a chemical change or reaction, you can use the procedure outlined in option 2:
Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
Here's how you can perform this procedure:
1. Start by measuring and recording the mass of the acid and the base separately using a balance. Make sure to record the masses accurately.
2. Combine the acid and base in a suitable container, ensuring that all the reactants are well-mixed.
3. Allow the reaction to proceed, and observe any changes that occur, such as bubbling or color changes.
4. Once the reaction has completed, measure and record the mass of the container, water, and salt product using the balance.
5. Calculate the mass of the water and salt by subtracting the mass of the container from the total mass obtained in the previous step.
By comparing the initial mass of the acid and base with the final mass of the resulting water and salt, you can show that matter is conserved during the chemical reaction. The total mass of the reactants should be equal to the total mass of the products.