Materials
-sandwich-sized plastic ziplock bag
-graduated cylinder
-paper cup
-rubber band
-measuring spoons
-vinegar
-baking soda
-twist-tie (like the closure for a loaf of bread)
Part 1: The Reaction
1.Use the paper cup during this part of the experiment.
2.Measure out 25.0 mL of vinegar and pour into the cup.
3.Measure out 1/2 tsp. of baking soda using a piece of paper towel to hold the baking soda. In the data table below, record the amount of baking soda used.
4.Add the baking soda to the vinegar slowly. Don't let the bubbles overflow the cup. Observe the reaction and record in the data table.
5. Before moving on to Part 2, answer the analysis questions for Part 1.
Data Table Part 1
Amount of vinegar=
Amount of baking soda =
Observations of reaction=
Part 2: Conserving Mass
1.You may use any of the listed materials for this part of the procedure. If you were to mass the contents before and after the reaction, you would notice that the mass was less after the reaction than before.
2.Based on your answer to #2 in the Part 1 analysis questions, devise a method for repeating the experiment without losing any mass. Use the same amount of reactants, but you may use the different items from the materials list. Part 2 of the analysis questions will ask you to write the procedure that you used.
Analysis Part 1
1.Did mass appear to be conserved during this chemical reaction? In other words, did it look like there was more or less mass than what you started with? Simply describe what you saw, not what you think should have happened. Use complete sentences for your answer.
2.If you could mass the reactants before and after the reaction, you would see that the mass was less after the reaction. Based on what you observed during the reaction, where did the extra mass go? Remember that mass cannot be destroyed in chemical reactions.
3.Please describe how you performed the procedure in Part 2. Your answer should be in paragraph form, third person, and past tense. For example: "Fifty milliliters of water was placed in the flask" not "I placed fifty milliliters of water in the flask". Please be specific when describing your materials and methods.
4.Describe how your experiment might prove that mass was conserved.
Please someone help..
Obviously this is an experiment which you can do at home as well as in a lab. This is a homework help board. We are glad to help but we won't do the work for you. If you will type in your answers and any specific questions you have about any part of the experiment, someone here will critique it for you. Give details about what you don't understand if that is the problem.
I seriously need help with this too.
I'm just not understanding it.
Yeah , like how do you answer the third question . I don't get it .
I'm doing this now....
the third question is the easiest.. just create your own lab. for example, do the exact same thing but in a zip-locked bag because then the mass is conserved
To complete Part 1 of the experiment, follow these steps:
1. Use the paper cup provided in the materials list.
2. Measure out 25.0 mL of vinegar using the graduated cylinder and pour it into the cup.
3. Use a measuring spoon to measure out 1/2 tsp. of baking soda. To prevent spilling, you can hold the baking soda on a piece of paper towel. Record the amount of baking soda used in the data table.
4. Slowly add the baking soda to the vinegar in the cup. Be careful not to let the bubbles overflow the cup. Observe the reaction and record your observations in the data table.
5. Once the reaction is complete, move on to Part 2 of the experiment. Before doing so, answer the analysis questions for Part 1.
In your data table for Part 1, record the amount of vinegar used, the amount of baking soda used, and your observations of the reaction.
Now, let's move on to Part 2 of the experiment:
1. You can use any of the materials listed in the materials list for this part.
2. If you were to mass the contents before and after the reaction, you would notice that the mass is less after the reaction. Based on your answer to question #2 in the Part 1 analysis, devise a method to repeat the experiment without losing any mass. Keep the same amount of reactants but use different items from the materials list. You will explain your procedure in Part 2 of the analysis questions.
For the analysis questions:
1. Did the mass appear to be conserved during this chemical reaction? In other words, describe what you saw, not what you think should have happened. Use complete sentences for your answer.
2. The mass was less after the reaction. Based on your observations during the reaction, where do you think the extra mass went? Remember that mass cannot be destroyed in chemical reactions.
3. In Part 2 of the analysis, describe the procedure you used. Write in the paragraph form, in the third person, and past tense. Be specific when describing your materials and methods.
4. Lastly, explain how your experiment might prove that mass was conserved.
Hope this explanation helps you with the experiment!