Unknown Salts Lab Report

13. A soft surface and a hard, smooth tool would most likely have which type of toolmark?

Examine a piece of nichrome wire. On the data sheet, record the color and the luster of the metal. Use a forceps to hold the wire in the flame of your burner for about two minutes (recall where the hottest part of the flame is located). Describe the appearance of the wire while held in the hottest part of the flame. Allow the wire to cool and reexamine it. From your observations, determine if there was a physical or a chemical change. Give specific reasons for your conclusions. Save the nichrome wire for step #2.

The luminous yellow flame is smoky because no air is entering the burner and hydrocarbon is converted into carbon dioxide

Create a water bath by filling ½ of the 100 mL beaker with cool water, adding crushed ice to the beaker so the water level is just below the top, and sprinkling salt into the beaker

made supported one another. For instance, we observed that the red powder turned black when heat was applied, therefore Oxygen from

As soon as the flame catches onto the wick, the wax of the candle immediately begins to melt and evaporate through the wick to the flame to keep fueling it and allowing it to keep burning. The liquid can only burn in a vaporized or gaseous state, otherwise it would simply just melt. 3. What does cobalt chloride test for? Is this substance one of the products of the reaction?

4.) Using a different spatula, place a similar amount of baking soda in wells D,E and F. Again, recording any physical observations you observe.

In the Flame Test Lab we took different ions of salt and put them over a bunsen burner to determine the wavelength of the light. The wavelengths of light visible are in the group visible light: red, orange, yellow, green, blue, indigo, and violet. The colors in which we view an object are reflected off the object, the other colors are absorbed. Each element has a specific color that is given off; it is like a fingerprint. We recorded this data and compared it between the different salt ions, After that, our teacher gave us two unknowns to test.

A few metal elements in high temperatures may enter an excited state and they’re seen by emitting a light of color. Comparing the substance flame with the flames of the reference table will help identify the element of the unknown metal. First we placed each of the liquefied metals in flames and observing their color changes by collecting data. Lastly, observing the color of the liquefied metal, placing it in the flame with a wire loop could emit a color change and this concludes the experiment. The unknown metal was exactly the metal ion that was hypothesized. The unknown metal

Both of these experiments use the colors emitted to identify an element. The Flame Test is used to determine an elements identity in a solid state. Each element produces a different color when put into a flame, this is why scientists use the Flame Test to quickly identify an element. Line spectrum is used to identify elements in a gaseous state. This test is especially useful for astronomers who want to determine the composition of stars.

Flame Test Lab Report The purpose of this lab was to identify the colors of specific elements in there solid and liquid state when put into a flame. My theory was that when we put the element into the fire it would become excited and absorb the flame to make a different colored light appear. When it is in its ground state it is just plain and dull with no light coming off of the element. The element will absorb many stuff while getting into the excited state.

A flame test is conducted by dipping a wire loop into a solution that contains sodium or potassium ions, and then, once saturated, the loop is heated by a fire. This dissociates the salts into neutral atoms which, when heated to an ever higher temperature, excites the electrons such that they fulfill a higher energy level. When the electrons fall back down to their ground state, the resulting light will be a specific color depending on the ions present. When sodium is present the flame will be an intense yellow color, while the flame will appear violet in color if the solution contained potassium. When both are present together, however, the vibrancy of the sodium overpowers the faint color that the potassium ions emit, such that a filter made of cobalt glass must be used to block out the light of the sodium ions, so that the light produced by the potassium ions may be seen. The first week the experiment was conducted, the flame test was done on the sea water solutions, while the dehydrated salts, obtained by placing a sample of the sea water into an oven and allowed to evaporate, were used during the second

A few seconds were given to allow the smoke to fill the flask. The flask was removed from the flame and the limewater from the graduated cylinder was poured into the flask. A hand was placed over the top of the flask to prevent the smoke from escaping while swirling the flask to mix the smoke and limewater. All observations were

There were three main objectives of this experiment. The first objective was comparing and contrasting the heat of a Bunsen burner open flame and a candle, as well as how it affected a liquid (water.) The second included learning about the different pieces and parts of a Bunsen burner, and how to put them to use. The last objective was testing how oxygen affects spontaneous combustion, and the effects of lower versus higher oxygen on a flame. The first objective was reached by measuring how long it took for both liquids to come to a boil over both the Bunsen burner and the candle, while the second was achieved by practicing safety procedures around the Bunsen burner while taking apart and reassembling the burner to understand how it works and

This experiment can be used for many years to come. The experiment can be altered to test different kinds of flame resistant material. The tests can also include different fuel sources that might impact the flame resistance of material. The knowledge gained can be used to test and improve flame resistant material to make it more effective and less susceptible to decreased