Welcome to Gaia! :: View User's Journal | Gaia Journals

My element is Iodine.

- Iodine got its name from the Greek word " iodes ", meaning " violet-colored".

Some physical characteristics:
- Color: Violet - dark gray
- Physical State: Solid
- Atomic Mass: Approx. 126.9045
- Boiling Point: 365.7 Degrees Farhenheit
- Melting Point: 236.3 Degrees Farhenheit
- Flammablity Class: Non-combustible solid

Some Chemical Characteristics:
- Incapatible with ammonia, acetylene, acetaldehyde, powdered aluminum, active metals, and liquid chlorine
- Elemental Classification: Halogen

Interesting Facts:
- Iodine was considered such an important mineral that in 1920's, United States health officials advocated adding it to common table salt. Sodium Iodide was added in 1924 and as a result iodine deficiency-related problems such as goiters and cretinism were virtually eradicated in the U.S.
- Iodine is also a proven and effective antiseptic. In addition to helping clean and heal wounds, it will discolor the skin.

The Discovery of Iodine:
- Discoverer: Bernard Courtois
- Discovery Location: Dijon France
- Discovery Year: 1811

Mixtures are considered mixtures because it is a substance made by combining two or more different materials without a chemical reaction occurring.

My first mixture is saltwater. Two physical characteristics of saltwater are that saltwater is clear and is in a liquid state at room temperature. Saltwater is considered a mixture because it is a combination of salt and water. My second mixture is a fruit salad. Two physical characteristics of a fruit salad is that it is in a solid form at room teperature and its appearance can be colorful. A fruit salad is considered a mixture because it is composed of many different fruits ( watermelons, cantelopes, grapes, bananas, etc. ). One way to seperate saltwater is to boil the water in a pot until it is completly evaporated. On the bottom of the pot should be the leftover salt. A seperation techniques for seperating a fruit salad is to take the fruit and sort it. Another way to seperate a fruit salad is to eat the fruit you like and leave the unwanted fruit in the bowl you ate it from.

A compond is a substance consisting of two or more different elements chemically bonded together in a fixed proportion by mass.

One compound is calcium chloride. One physical characteristic of calcium chloride is that it is highly soluble in water. Another physical characteristic of calcium chloride is that it is a salt that is solid at room temperature. One chemical characteristic of calcium chloride is that calcium chloride can serve as a source of calcium ions in solution, for instance for precipitation because many calcium compounds are insoluble. One seperation technique of calcium chloride and water is to boil the water and evaporate it. Another compound is iodine monochloride. One physical characteristic of iodine monochloride is its physical state, which is a red to brown fuming liquid. Iodine monochloride's boiling point is at 97.5 Degrees Celsius at which it decomposes. One chemical characteristic is that it is stable under ordinary conditions, and is moisture and light sensitive.

The definition of element is one of a class of substances that cannot be separated into simpler substances by chemical means. A mixture is an aggregate of two or more substances that are not chemically united and that exist in no fixed proportion to each other. A compound is a composed of two or more parts, elements, or ingredients.

Elements, mixtures, and compound are alike because they all relate to chemicals and the periodic table of elements. These three are different because elements are part of a class of substances that cannot be seperated into simpler substances. Mixtures are an aggregate of two or more substances that are not chemically united. Compounds are composed of two or more parts that are chemically united.

My team and I think that Unknowm A ( pH 6, clear, acid ) is Calcium Chloride ( pH 6, clear, acid ). We think this because we eliminated every because of its pH or color. Vinegar was eliminated because of its pH of 2, which is too low. Baking Soda was eliminated because of its pH of 9, which is too high. Ammonia was eliminated because of it pH of 9, which is too high. Hydrochloric Acid was eliminated because of its pH of 1, which is too low. Sodium Carbonate was eliminated because of its pH of 11, which is too high. Sodium Hydroxide was eliminated because of its pH of 12, which is too high. Potassium Chromate was eliminated because of its color which is yellow, and A is clear. Sodium Hydrogen Sulfate was eliminated because of its pH of 2, which is too low. And lastly, Copper Sulfate was eliminated because of its color which is blue. That is what our data showed.

My team and I think that Unknown B ( pH 6, clear, acid ) is also Calcium Chloride ( pH 6, clear, acid ). We think this because we elimated every other chemical because of its pH or color. Vinegar was eliminated because of its pH of its pH of 2, which is too low. Baking Soda was eliminated because of its pH of 9, which is too high. Ammonia was eliminated because of it pH of 9, which is too high. Hydrochloric Acid was eliminated because of its pH of 1, which is too low. Sodium Carbonate was eliminated because of its pH of 11, which is too high. Sodium Hydroxide was eliminated because of its pH of 12, which is too high. Potassium Chromate was eliminated because of its color which is yellow, and A is clear. Sodium Hydrogen Sulfate was eliminated because of its pH of 2, which is too low. And lastly, Copper Sulfate was eliminated because of its color which is blue. So basically, Unknown B had all the same reactions as Unknown A did. That is what our data showed.

My team and I think that Unknown C ( pH 3, clear, acid ) is Vinegar ( pH 2 ( The pH paper isn't accurate ) clear, acid ). We think this because we eliminated every other chemical because of its pH or color. Baking Soda was eliminated because of its pH of 9, which is too high. Ammonia was eliminated because of it pH of 9, which is too high. Calcium Chloride was eliminated because of its pH of 6, which is too high. Hydrochloric Acid was eliminated because of its pH of didn't have the same reactions to the same chemicals as Unknown C. Sodium Carbonate was eliminated because of its pH of 11, which is too high. Sodium Hydroxide was eliminated because of its pH of 12, which is too high. Potassium Chromate was eliminated because of its color which is yellow, and A is clear. Sodium Hydrogen Sulfate was eliminated because it didn't have the same reactions to the other chemicals as Unknown C. And lastly, Copper Sulfate was eliminated because of its color which is blue. That is what our data showed.

My team and a I could not identify Unknown D because it had no reaction with any of the chemicals. We eliminated all the chemicals because of pH, color, or chemical reactions. Vinegar was eliminated because of its pH of its pH of 2, which is too low. Baking Soda was eliminated because of its pH of 9, which is too high. Ammonia was eliminated because of it pH of 9, which is too high. Hydrochloric Acid was eliminated because of its pH of 1, which is too low. Calcium Chloride was eliminated because of the fact that it didn't have any of the same reactions. Sodium Carbonate was eliminated because of its pH of 11, which is too high. Sodium Hydroxide was eliminated because of its pH of 12, which is too high. Potassium Chromate was eliminated because of its color which is yellow, and A is clear. Sodium Hydrogen Sulfate was eliminated because of its pH of 2, which is too low. And lastly, Copper Sulfate was eliminated because of its color which is blue. So basically, Unknown B had all the same reactions as Unknown A did. That is what our data showed. ( Although, I think Unknown D is water because water wouldn't have reacted to anything and its pH was 6 when i tested it. )