A. Heating Magnesium:
This station consisted of magnesium, a slim, flexible, silver metal and a Bunsen burner. We used crucible tongs to hold the magnesium over the Bunsen burner until it began to ignite. When it first ignited, sparks were seen and the flame emitted a bright, white light. The flame spread across the magnesium and eventually turned it into a white, ashy substance. The combination of fire and magnesium caused a chemical change. This is evident as there were many signs of a chemical change, such as an emission of light, a color change, and an odor change. The emission of light was the bright white fire, the color change was the change from the silver magnesium to the white ashes, and the odor change was the smell of burnt metal …show more content…
When mixed, they formed a dark blood red liquid. Before they were mixed, the two liquids had a mass of 3.43 grams. When mixed, they ended up with a mass of 3.33 grams. This was because some of the liquid from the tubes possibly evaporated. We then mixed a barium nitrate solution, a white powdery liquid with an iron sulfate solution, another clear liquid. Before mixing, the total mass was 3.2 grams. After mixing the two substances, the combination of the two liquids ended up looking very powdery. We then mixed both combined solutions together in a centrifuge, and when they were mixed, one tube turned red, while the other tube became clear. There was also a white powder at the bottom of the clear tube. This reaction is a chemical change. This was shown through the color change of the mixtures, and the precipitate that was formed at the bottom of the tube. These are all characteristics of a chemical change.
D. Copper (II) Sulfate and Water:
In this station, we used a mortar and pestle to grind up copper (II) sulfate, which were light blue crystals, and mixed it with clear, distilled water. When we mixed the two together, the crystals started to dissolve and the water turned blue, but stayed translucent. There were still crystals in the water after the reaction had finished. This is an example of a physical reaction, as there was an expected color change, and the liquid didn’t solidify. These are all examples of a physical change, rather than a chemical change.
E. Isopropyl (rubbing) alcohol and
This station consisted of magnesium, a slim, flexible, silver metal and a Bunsen burner. We used crucible tongs to hold the magnesium over the Bunsen burner until it began to ignite. When it first ignited, sparks were seen and the flame emitted a bright, white light. The flame spread across the magnesium and eventually turned it into a white, ashy substance. The combination of fire and magnesium caused a chemical change. This is evident as there were many signs of a chemical change, such as an emission of light, a color change, and an odor change. The emission of light was the bright white fire, the color change was the change from the silver magnesium to the white ashes, and the odor change was the smell of burnt metal …show more content…
When mixed, they formed a dark blood red liquid. Before they were mixed, the two liquids had a mass of 3.43 grams. When mixed, they ended up with a mass of 3.33 grams. This was because some of the liquid from the tubes possibly evaporated. We then mixed a barium nitrate solution, a white powdery liquid with an iron sulfate solution, another clear liquid. Before mixing, the total mass was 3.2 grams. After mixing the two substances, the combination of the two liquids ended up looking very powdery. We then mixed both combined solutions together in a centrifuge, and when they were mixed, one tube turned red, while the other tube became clear. There was also a white powder at the bottom of the clear tube. This reaction is a chemical change. This was shown through the color change of the mixtures, and the precipitate that was formed at the bottom of the tube. These are all characteristics of a chemical change.
D. Copper (II) Sulfate and Water:
In this station, we used a mortar and pestle to grind up copper (II) sulfate, which were light blue crystals, and mixed it with clear, distilled water. When we mixed the two together, the crystals started to dissolve and the water turned blue, but stayed translucent. There were still crystals in the water after the reaction had finished. This is an example of a physical reaction, as there was an expected color change, and the liquid didn’t solidify. These are all examples of a physical change, rather than a chemical change.
E. Isopropyl (rubbing) alcohol and