<p>Name ______Date ______Period ______</p><p>Inquiry 25.1 Measuring Mass in a Chemical Reaction</p><p>Directions: Record all the measurements you make in the table below. Calculate any changes in mass and record them in column 4 of the table. </p><p>Table 1. Results from Inquiry 25.1 BEFORE AFTER Mass of tablet, Mass of solution and Change in Notes and Conditions container and water container after Mass (g) Observations before mixing (g) reaction is complete (g)</p><p>Open Beaker</p><p>In Closed Bottle</p><p>(Same mass as closed bottle before mixing) After Bottle was Opened</p><p>Reflection Questions 1. What evidence do you have that a chemical reaction took place when you added the tablet to the water?</p><p>2. What happened to the mass when the experiment was performed in an open beaker? Try to explain this result. </p><p>3. Why didn’t you get the same result when you used the closed bottle?</p><p>4. What happened to the mass of the bottle, cap, and contents after the cap was removed? Explain this result.</p><p>5. What do you think the idea of ‘conservation of mass’ means? Explain in your own words. </p><p>6. Compare conservation of mass in phase change to conservation of mass in a chemical reaction. How are they alike? Explain.</p><p>CONTINUED Read “The Mass of Matter” in your Properties of Matter book, pgs 228-229. Answer the following questions. </p><p>1. Which scientist was able to prove the law of conservation of mass? How did he/she accomplish this?</p><p>2. When a piece of fruit is left in a sealed container, the mass before and after decomposition is the same, explain what has happened. </p><p>3. When Antoine heated elements in sealed containers with air he found that new substances were formed that were heavier than the original elements. Explain what happened. </p><p>4. What important discovery did Antoine make about air?</p><p>5. Antoine is credited for developing the law of conservation of mass, restate his law. </p><p>6. Compare and contrast Matter & Non-Matter in a t-chart or Venn diagram below. Include at least 3 similarities and 3 differences.</p>