RAINBOW DENSITY LAB:
Materials:
• Scale/Balance
• One 50 mL Graduated Cylinder
• Two 150 mL Beakers
• Pipette
• A sheet of white background paper - in this case, we used our lab worksheets - This is used by putting it behind your completed work to see more clearly of the blended layers of the colors
• kosher Salt
• Food Coloring - Red, Orange, Yellow, Green and Blue
• Water
Instructions:
Prepare each solution by adding salt, water, and food coloring in the following amounts:
By carefully following the instructions from our lab worksheet, my partner and I got one graduated cylinder and two beakers. Next, we went to the sink to fill up our beakers with water. After finishing that up, we went to the salt station and measured 16.0 grams of salt for our first rainbow color. After that, we poured the 16.0 grams of salt into our beaker full of water. My partner then mixed the solution up.
As I watched, she mixed the salt into it dissolved... but there was still some salt left so I took the beaker and mixed it up 'til every grain of salt was
After stirring the beaker, we got a pipette and got some blue food coloring, and slowly, one by one added three drops of the blue coloring into our beaker. Mrs. Ogo had told us earlier to add a few more drops of food coloring if we needed to, since the colors turned out too light. We did that and that's why we added one more drop of blue in.
After adding the drops, my partner began to stir once again, using a stirring rod.
After the process of stirring up the blue solution, we repeated the above steps with our other colors. We left the blue beaker next to our work station and I got up to get the water for the second beaker. Once I got the appropriate amount for the beaker, I gave my partner that beaker, and carefully paced over to the salt station and measured out 11.7 grams of salt. Once the measuring was done, I carefully carried the salt over to where my partner was sitting and poured in the salt. While she was stirring that beaker, I got my pipette and cleaned it up and got some green food coloring. I helped my partner stir the beaker solution up and squeezed five drops of green into that beaker. My partner once again began stirring.
Once the solution was perfected, we began adding the blue solution into our 50 mL graduated cylinder. I held the cylinder tightly with both my hands. I had tilted it at a 45 degree angle, so that when my partner squeezed the solutions in, the colors would be able to perfectly blend into each other. I also wanted the cylinder to be tilted because I had heard that it was much easier to do so like that. I also speak from experience. She began with the blue. She squeezed some into a new pipette and began to pour in the blue, until it reached the 20 mL level. We didn't need to be careful on this one because it was the first color. You don't need to be careful and slow, because you aren't blending in colors... yet.
Next, my partner added the green into the cylinder, slowly but quickly, slowly but quickly. After doing that for quite some time, I told her to stop. I wanted to check if we had reached 40 mL yet. I checked and,
Next, we did the yellow. (We actually messed up doing yellow, we had gotten orange instead, so I got another beaker to do the new yellow). Once again, I gave a beaker to my partner and I (this time) ran over to the salt stations and measured out 7.2 grams of salt. I quickly, but gently, poured the salt into that beaker, and let my partner stir the solution up. I went and got the yellow food coloring with my pipette and dropped two into the beaker. After I did that, my partner quickly began stirring. (he finally got the idea to stir until everything was mixed and dissolved.)
After doing all that, we repeated what we did with the blue and the vibrant green. I tilted the cylinder while my partner squeezed the yellow coloring in. If you look closely, you can see that the yellow is beginning to blend in with the vibrant green.
Oh yeah. . As y'all can see, my partner and i were glad that we actually doing something right
Materials:
• Scale/Balance
• One 50 mL Graduated Cylinder
• Two 150 mL Beakers
• Pipette
• A sheet of white background paper - in this case, we used our lab worksheets - This is used by putting it behind your completed work to see more clearly of the blended layers of the colors
• kosher Salt
• Food Coloring - Red, Orange, Yellow, Green and Blue
• Water
Instructions:
Prepare each solution by adding salt, water, and food coloring in the following amounts:
By carefully following the instructions from our lab worksheet, my partner and I got one graduated cylinder and two beakers. Next, we went to the sink to fill up our beakers with water. After finishing that up, we went to the salt station and measured 16.0 grams of salt for our first rainbow color. After that, we poured the 16.0 grams of salt into our beaker full of water. My partner then mixed the solution up.
As I watched, she mixed the salt into it dissolved... but there was still some salt left so I took the beaker and mixed it up 'til every grain of salt was
After stirring the beaker, we got a pipette and got some blue food coloring, and slowly, one by one added three drops of the blue coloring into our beaker. Mrs. Ogo had told us earlier to add a few more drops of food coloring if we needed to, since the colors turned out too light. We did that and that's why we added one more drop of blue in.
After adding the drops, my partner began to stir once again, using a stirring rod.
After the process of stirring up the blue solution, we repeated the above steps with our other colors. We left the blue beaker next to our work station and I got up to get the water for the second beaker. Once I got the appropriate amount for the beaker, I gave my partner that beaker, and carefully paced over to the salt station and measured out 11.7 grams of salt. Once the measuring was done, I carefully carried the salt over to where my partner was sitting and poured in the salt. While she was stirring that beaker, I got my pipette and cleaned it up and got some green food coloring. I helped my partner stir the beaker solution up and squeezed five drops of green into that beaker. My partner once again began stirring.
Once the solution was perfected, we began adding the blue solution into our 50 mL graduated cylinder. I held the cylinder tightly with both my hands. I had tilted it at a 45 degree angle, so that when my partner squeezed the solutions in, the colors would be able to perfectly blend into each other. I also wanted the cylinder to be tilted because I had heard that it was much easier to do so like that. I also speak from experience. She began with the blue. She squeezed some into a new pipette and began to pour in the blue, until it reached the 20 mL level. We didn't need to be careful on this one because it was the first color. You don't need to be careful and slow, because you aren't blending in colors... yet.
Next, my partner added the green into the cylinder, slowly but quickly, slowly but quickly. After doing that for quite some time, I told her to stop. I wanted to check if we had reached 40 mL yet. I checked and,
Next, we did the yellow. (We actually messed up doing yellow, we had gotten orange instead, so I got another beaker to do the new yellow). Once again, I gave a beaker to my partner and I (this time) ran over to the salt stations and measured out 7.2 grams of salt. I quickly, but gently, poured the salt into that beaker, and let my partner stir the solution up. I went and got the yellow food coloring with my pipette and dropped two into the beaker. After I did that, my partner quickly began stirring. (he finally got the idea to stir until everything was mixed and dissolved.)
After doing all that, we repeated what we did with the blue and the vibrant green. I tilted the cylinder while my partner squeezed the yellow coloring in. If you look closely, you can see that the yellow is beginning to blend in with the vibrant green.
Oh yeah. . As y'all can see, my partner and i were glad that we actually doing something right