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.

Did you do this experiment or are you trying to dry lab it? If you did it the questions should be easy to answer. If you are trying to dry lab it (by getting answers) and never doing the experiment, I won't help.

I can't to seem how to get the lab going?

FLVS!!!!

i am doing this right now. i don't wanna do the lab cuz i am too lazy and i am tryong to figure out the answers

if u ever found the answers, post them up

I feel liike a nerd lol ;P

with the open cup The mixture instantly started fizzing up and once it stopped there was less mass in the cup.
in the closed plastic bag no gas escaped during the fizzing so the mass stayed the same.

To answer the questions and complete the experiment, follow these steps:

Part 1: The Reaction

1. Gather the materials needed, including a sandwich-sized plastic ziplock bag, graduated cylinder, paper cup, rubber band, measuring spoons, vinegar, baking soda, and twist-tie.

2. Use the paper cup for this part of the experiment.

3. Measure out 25.0 mL of vinegar using the graduated cylinder and pour it into the paper cup.

4. Measure out 1/2 tsp. of baking soda using measuring spoons. Hold the baking soda with a piece of paper towel to prevent direct contact. Record the amount of baking soda used in the data table.

5. Slowly add the measured baking soda to the vinegar in the paper cup. Be careful not to let the bubbles overflow the cup. Observe the reaction and record your observations in the data table provided.

6. Answer the analysis questions for Part 1 before moving on to Part 2.

Data Table Part 1:
Amount of vinegar=
Amount of baking soda=
Observations of reaction=

Part 2: Conserving Mass

1. In this part, you can use any of the listed materials from the previous materials list. The goal is to repeat the experiment without losing any mass while using the same amount of reactants.

2. Based on your answer to question #2 in the Part 1 analysis, devise a method for repeating the experiment without losing any mass. You can use different materials from the list to achieve this. In the Part 2 analysis, you will need to write the procedure you used.

Analysis Part 1:

1. In this question, describe what you observed during the reaction. Did the mass appear to be conserved, or did it look like there was more or less mass than what you started with? Use complete sentences to answer this question.

2. 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 this question, describe how you performed the procedure in Part 2. Write your answer in paragraph form, in the third person and past tense. Be specific when describing your materials and methods.

4. Explain how your experiment might prove that mass was conserved.