Quest 7: Conservation of Mass

Q7P1: CH.7 True and False

Go to Google Classroom. Open the Q7P1: CH.7 True and False. Read the text carefully and answer the true and false. Make sure to read for understanding! And, look up the answers to the True and False using the text. Don't just guess. This learning is extremely important for you to be successful on the upcoming labs.

Go show Mrs. Roehm your score on the True and False and ask her for help on anything you don't understand.

Q7P2: Reassess

Reassess on learning target CH.7. It is the 1st skill on the back of the page. You have a paper copy of this. It looks like this.

Bring your learning target page to Mrs. Roehm. She is going to quiz you on bullet point 3 and bullet point 8. Make sure you review the information in those bullet points before checking in.

Q7P3: Once You Pop and Start the Fire, Wool Ya?

Complete the labs and then answer the questions on the Quest 7 Labs Assignment in Google Classroom.

Once you Pop, You Can't Stop Lab Set Up:

Procedure:

1. Ask Mrs. Roehm to come explain the safety risks at this lab station before you begin.

2. Put on goggles. The student handling the test tube should wear gloves. ONLY THE STUDENT HANDLING THE TEST TUBE.

3. Wearing gloves add about an inch of zinc to the test tube.

4. Pour 2 eye droppers full of HCl into a test tube.

5. Wearing gloves, stick your thumb into the test tube to create a plug. You should keep your thumb in the test tube until you feel pressure under your thumb as the gas builds up.

6. Another student should light a match when the gas has built up. (Don't complete step 7 until the match is lit!)

7. Remove thumb and pass a lighted match over the top of the test tube! Listen closely!

8. Answer the questions in the Quest 7 Labs assignment in GC.

Start the Fire Wool Ya? Set Up:

The Procedure:

1. Put on goggles.

2. Using the tongs, get a piece of steel wool from Mrs. Roehm and place it on the 6 volt battery so that the steel wool is touching both prongs.

3. Watch and observe the chemical changes that take place.

4. Do not touch the used wool; it is hot! Use the tongs to throw the steel wool away.

5. Answer the questions in the Quest 7 Labs assignment in GC.

Show Mrs. Roehm your finished questions a signature.

Q7P4: Steel Wool and Vinegar and Bubble Bang

Complete the next two lab stations from the Quest 7 Lab Assignment in GC. The lab procedures are below.

Steel Wool and Vinegar The Set Up:

The Procedure:

1. Put on goggles.

2. It is key that you do not mix up the eye droppers! No cross contamination!

3. Add 1 eye dropper of ammonia. (The stuff with the tin foil over the beaker)

4. In the cupboard above the lab station, there is a jar with a liquid and steel wool in it (This liquid is called iron acetate). Add iron acetate (the stuff in the jar) one drop at a time into to your test tube. (Maybe like 5 drops - or when you clearly see the precipitate.)

5. Look carefully at the test tube.If you don't see a precipitate, add more ammonia.

6. If you still don't see a precipitate, ask Mrs. Roehm to come help.

Student Tips:

The green you see is from green, solid particles inside. This is a precipitate!
If you let a test tube sit for a little while, the solid particles settle and it can become more clear.

Bubble Bang Set Up:

The Procedure:

1. Put on goggles.

2. Measure 50 mL of vinegar into a beaker.

3. Add enough full eyedroppers of red cabbage juice until the vinegar really turns pink.

4. Pour the pink vinegar into the zip lock bag.Close the sandwich bag almost all the way closed, leaving just enough room to scoop in the baking soda.

5. Add a tablespoon of baking soda to the bag and close it quickly! Hold the bag over the sink! (Touch the bag...did the temperature change?)

Tips:

Make sure you touch the bag, it gets very cold!

Show Mrs. Roehm your completed questions from the Quest 7 Labs assignment in GC for a signature

Q7P5: X Man Mania and Marshmallow Molecules

Complete the labs on the Quest 7 Labs assignment in GC. Yes, we have done both of these before. We are looking at them in a different way now. Follow the procedures below and complete the lab questions to earn XP.

X Men Mania Set Up:

The Procedure: Read ALL the directions and the TIPS below the directions before doing the lab.

1. Put on goggles.

2. Measure about 30 ml of hydrogen peroxide and pour it into a SMALL beaker.

3. Set the beaker on a piece of paper towel.

4. Add one scoop (1/4 tsp) of dry, active yeast.

5. Shake/wiggle the beaker really well to mix the yeast with the Hydrogen Peroxide.

6. It must be shaken well in order to work! Bubbles will begin to rise to the top of the beaker.

7. Take a skewer and light the end of the skewer and let it burn for a decent amount of time.

8. Blow out the flame so that there are red hot embers remaining.

9. Take your finger and gently swipe your finger across the top of the beaker to remove the bubbles with yeast. Wipe the bubbles on the paper towel.

10. Take the hot end of the skewer and hold it completely vertical. SLOWLY lower the skewer into the WHITE bubbles. As soon as the skewer lights on fire, remove it. Blow out the flame and try again!

Tips:

When mixing the yeast in the hydrogen peroxide, swirl it really quickly and vigorously. Then, STOP! If you swirl for too long, it doesn't work as well.
It is important that the skewer has red embers on it before lowering it into the bubbles.
Lower the skewer straight down, not at an angle.
If you lower the stick to quickly, it will become wet from all of the bubbles and will not work. It is very important to go slow and to remove the skewer once it ignites.
Once the skewer ignites, have the students pull it out, blow it out, and let another student try. The reaction is so cool, but if the first student doesn't pull out the skewer, they can "use" up all of the oxygen bubbles and no one else will get a chance.
In my class, this is actually the second time we have used this lab station (Pop Your Top is the other lesson); however, the questions here are geared towards conservation as opposed to evidence of a chemical change.

Marshmallow Marshmallows Set Up:

The Procedure:

1. Go get the reactants from Mrs. Roehm.

2. Set one CH4 molecule in the first reactant spot.

3. Set 2 O2 molecules in the second reactant spot.

4. The arrow means "yields". It means that a chemical reaction is taking place.

5. To show that a chemical reaction is taking place, detach the marshmallows from the toothpicks that connect the marshmallows of the reactants together.

6. Rearrange the atoms and reconnect them in order to form the products.

REMEMBER: There is a specific way that we make carbon dioxide and water molecules. Make sure to build them correctly.

7. Place the CO2 in the first product place and set the 2 water molecules in the 2nd products place.

8. Go get Mrs. Roehm. Show her the products you created before you leave the station.

Show Mrs. Roehm your completed Quest 7 Lab assignment from GC.