Exploring Atomic Structure & Electromagnetic Radiation

The Guiding Question we were trying to answer was What are the identities of the unknown substances? We were trying to find the unknown substances based upon a flame test and the emissions of the other seven known solutions. During the investigation we were given seven different toothpicks that were soaked in different ions of chloride, one by one we stuck it into the inner flame of the Bunsen burner and observed and recorded what colour of light the flame produced. Our claim was The unknowns were 1-Lithium, 2-Strontium, 3-Barium, 4-Sodium. Our evidence for this is below.

Ion           Colour of Flame
Calcium- orange/red
Barium- yellow/lime green
Copper II- green
Lithium- red
Potassium- peach
Sodium- neon orange
Strontium- bright red/orange
Unknown #1 -peach
Unknown #2- red/orange
Unknown #3- yellow/green
Unknown #4- bright orange

Our justification for this is that the flame test works because these ions are composed differently and require different amounts of energy to move electrons to different orbitals which creates different lights/colours. Electrons absorb energy from the heat which makes the electrons go to an "excited state". Then the electrons go back to their ground state and the energy was released which created the different flame colours. The amount of energy and flame Colorado depends on how many orbitals the electrons had to move across. More orbitals means more energy. Based on the colours we found for each ion we associated each unknown colour with an ion. Our decisions were based upon the flame colour brightness and shade of each colour.

Comments

Post a Comment

Popular posts from this blog

3 Question Blog 4/20/18

What have I completed lately? -I have completed worksheets and notes on endothermic and exothermic reactions, as well as a test, and a POGIL about Mole Ratios. What have I learned recently? -I have learned extensively about endothermic and exothermic reactions. Exothermic reactions release energy to make bonds (temperature increases), and in endothermic reactions enegry is absorbed and gained to break bonds (temperature decrease). I have also learned about Mole Ratios and what their purpose is when it comes to chemical reactions. What will I do to further my learning? -I will continue to ask questions in class, and be attentive in class. I will also study if I am struggling to grasp any concepts covered in class.
Read more

Exploring Measurement in the Food Industry

Our task for this lab was to collect mass information about various bags of Cheetos and use our data to determine the accuracy and precision of the bags. The purpose of this lab was to answer the guiding question, "Do you get what you pay for?". In this lab we used accuracy and precision to determine whether or not you get your money's worth when buying a small bag of Cheetos. On the packaging the bag states it's net weight is 28.3 grams. We used four different Cheetos bags to gather information. The first step was to find accuracy. Accuracy is defined as the net weight of 28.3g +/- .10g. We weighed the full bags of Cheetos separately and recorded the results, this is the gross weight. We then emptied the contents of the bags and weighed the packaging and recorded those results, this is the tare weight. After finding the gross and tare weight we then subtracted the tare weight from the gross weight and found our difference. The results are below. (G= Gross, T=Tare, D=
Read more

3 Question Blog 2/2

1. Recently I have completed a POGILs on Polyatomic atoms, Ionic compounds, and also Molecular compounds. I have also completed a foldable and a lab about the VSEPR model. 2. I have learned about naming molecular, ionic, and polyatomic compounds. Also i have learned about VSEPR. VSEPR stands for V alence S hell E lectron P air R epulsion theory. It means that since electrons repel each other they will be repulsed to the furthest possible distance away from one another within the limits of their bond. Unbounded electrons take up more space than bonded electrons. 3. To improve my learning I will continue to ask questions if I am having trouble understanding the material.
Read more