Density Lab
Materials:
- two 250ml beakers, one 500ml beaker
- electronic scale
- glass stirring rod
-pickling salt, water samples (warm and cold) , and food coloring (blue and yellow)
- two 250ml beakers, one 500ml beaker
- electronic scale
- glass stirring rod
-pickling salt, water samples (warm and cold) , and food coloring (blue and yellow)
Procedure:
1) Mass each empty 250 ml. Record the weight of the beaker below: (in grams)
Beaker #1: 107.5
Beaker #2: 112.2
2) Measure 250 ml of "cold" water and place into Beaker #1 and 250 ml of the "warm" water in Beaker #2.
3) To the "cold beaker" (Beaker #1), add 20 g of salt and 5 drops of blue food coloring. Use thhe stirring rod to stir the solution until the salt has fully dissolved.
4) Add 5 drops of yellow food coloring to the warm, fresh water (Beaker #2)
5) Mass each beaker PLUS water and record the new mass below:
Beaker #1: 292.4
Beaker #2: 326.3
6) Calculate the mass, volume and density of the water in each beaker:
1) Mass each empty 250 ml. Record the weight of the beaker below: (in grams)
Beaker #1: 107.5
Beaker #2: 112.2
2) Measure 250 ml of "cold" water and place into Beaker #1 and 250 ml of the "warm" water in Beaker #2.
3) To the "cold beaker" (Beaker #1), add 20 g of salt and 5 drops of blue food coloring. Use thhe stirring rod to stir the solution until the salt has fully dissolved.
4) Add 5 drops of yellow food coloring to the warm, fresh water (Beaker #2)
5) Mass each beaker PLUS water and record the new mass below:
Beaker #1: 292.4
Beaker #2: 326.3
6) Calculate the mass, volume and density of the water in each beaker:
Mass (g) Volume (ml) Density (g/ml) |
Cold, Salty Water
107.5 200 0.5375 |
Warm, Fresh Water
112.2 200 0.561 |
Part 2:
1) Pour the warm, fresh water (beaker #1) into the 500 ml beaker and place the beaker on the table. Let the water settle until the surface has stopped moving.
2) Carefully add the cold, salt water. Use the spoon to break the fall of the liquid into the 500 ml beaker by placing the spoon at the top of the water in the 500 ml beaker and gently pouring the cold water from the 250 ml beaker onto the spoon.
3) Allow the layers to settle for 2-3 minutes.
1) Pour the warm, fresh water (beaker #1) into the 500 ml beaker and place the beaker on the table. Let the water settle until the surface has stopped moving.
2) Carefully add the cold, salt water. Use the spoon to break the fall of the liquid into the 500 ml beaker by placing the spoon at the top of the water in the 500 ml beaker and gently pouring the cold water from the 250 ml beaker onto the spoon.
3) Allow the layers to settle for 2-3 minutes.
Part 3 :
1) I saw the blue water and yellow water mix to make the third green layer.
2) When i tilt the beaker for 15 seconds, it had one layer of blue, one layer of yellow, and another layer of green. You had to do this very slowly or else the green layer would not have showed up.
1) I saw the blue water and yellow water mix to make the third green layer.
2) When i tilt the beaker for 15 seconds, it had one layer of blue, one layer of yellow, and another layer of green. You had to do this very slowly or else the green layer would not have showed up.
Part 4:
Yes i think i could create a third layer in my beaker by carefully pouring the third color inside slowly.
1) I expect the third color to be green.
2) I think the third layer would form on top of the two other layers.
3) I think the density for this layer would be more denser because its two of the colors combined.
Yes i think i could create a third layer in my beaker by carefully pouring the third color inside slowly.
1) I expect the third color to be green.
2) I think the third layer would form on top of the two other layers.
3) I think the density for this layer would be more denser because its two of the colors combined.
Lesson Review:
1) I would create the 3rd layer by pouring the third color in very slowly so it does not merge with the other layers.
2) The name of this temperature stratification is called thermal stratification.
3) Thermal stratification is important because stratification is the mixing of the oceans thermocline. It creates and sustains life.
1) I would create the 3rd layer by pouring the third color in very slowly so it does not merge with the other layers.
2) The name of this temperature stratification is called thermal stratification.
3) Thermal stratification is important because stratification is the mixing of the oceans thermocline. It creates and sustains life.