This week we focused on many things considering we have a test this upcoming Tuesday. A lot of white boarding was done to help us see how other classmates found answers and explanations. We also did a lot of reading and even the Chrome books got involved midway through the week. As stated, our big test is coming up and this week was crunch time for us.
Early in the week, we mainly reviewed what was done in the previous week. This means we took out our worksheets and we were told to white board them. As some of us were confused as to how to the worksheet (Avogadro's Hypothesis), white boarding gave us an understanding of how the rest of the class analyzed and did the work for the problems. This helped us get feedback on our work as well. Some problems we did wrong, but getting the class to help allowed us to correct our work, especially because Dr. J bases our learning off of student communication.
Midway through the week, the Chrome books came out and we did a fun activity where we learned about different scientists and their experiments. The website gave us the opportunity to physically do the experiments by clicking on the elements and such. The worksheet given to us, helped us analyzed what the experiments represented before and after the reactions took place. It also showed us what happened at different amounts of the elements (100g, 200g, 300g etc.). After turning that in, we were given a reading assignment on the race to discover Iodine. This reading elaborated on the fact that Davy and Gay-Lussac were competing to be the first one to find out what really was the element, although Bernard Courtois was actually the first to make the discovery. While routinely processing the ash from seaweed to recover sodium and potassium compounds, he released a curious violet vapor. This was Iodine but the credit went to Gay-Lussac for beating everyone else to the media.
Finally, towards the end of the week we worked on worksheets that helped us understand how to analyzed the ratio of the masses of compounds. We were asked to determine the ratio of masses for certain compounds and then asked to compare the ratios. As a last part, we were then given different hypothesis's and had to draw diagrams. This part really confused me and honestly still does a little bit. I don't understand the concept of taking the ratios and putting them into model form. We even white boarded this as a class but I was still confused as to how classmates got answers. The final worksheet we did this week, was another ratio worksheet where we were asked to find the ratio of 3 elements to a compound. This worksheet was a lot easier in finding the ratio and finding the percentages.
So this week was full of worksheets and reading that is helping us prepare for the test on Tuesday. Hopefully Monday will help me understand the ratios better and hopefully this past week will help me through this test.
Sunday, September 27, 2015
Sunday, September 20, 2015
Week 2 9/14/15 - 9/18/15 Reflective blog
This week we went over many things. The main idea was we learned the difference between particles, mixtures and compounds and Avogadro's hypothesis. Early in the week, we did a worksheet called Classification of Matter where we analyzed diagrams and attempted to label which are Atoms, which are Particles, and which are Molecules. The diagrams showed different chemical bonds that formed molecules and even showed only atoms. As I kept working on the worksheet, the questions became more specific. The questions on the second page gave me the chemical formula and I had to analyze how many atoms were in that molecule. Questions later on that page asked what the actual letters and numbers represented in the equation. This helped me get a better understanding of chemical equations and what they consisted of.
We also learned the difference between a pure substance and a mixture on the same worksheet. We were then asked to classify the chemical equation either as a pure substance or mixture. Then we repeated that process, only now we learned the difference between an element and a compound.
Then we learned how you would separate a mixture. We started by watching a video of a scientist using a technique that separated two substances. Following this we received a worksheet that helped us understand the different techniques and gave us the chance to explain why one technique would be better to separate two specific substances rather than another substance. On the back of that worksheet we were asked to identify mixtures, pure substances, compounds, and elements when we were given 4 pictures. This gave us a better understanding of what the particles represented when there were more than one kind, or when they were connected in a different manner.
Finally, we learned about Avogadro's Hypothesis. This hypothesis states that gases (at the same temperature and pressure) reacted in simple integer volume ratios. Meaning that as a conclusion, 2 molecules of hydrogen combine with one molecule of Oxygen to form water works only if we assume that each volume of gas contains the same number of particles. We were then asked to represent molecules in diagrams to show our understanding. This concluded the week of learning and as we move on from here, I am excited to see what we are going to learn.
We also learned the difference between a pure substance and a mixture on the same worksheet. We were then asked to classify the chemical equation either as a pure substance or mixture. Then we repeated that process, only now we learned the difference between an element and a compound.
Then we learned how you would separate a mixture. We started by watching a video of a scientist using a technique that separated two substances. Following this we received a worksheet that helped us understand the different techniques and gave us the chance to explain why one technique would be better to separate two specific substances rather than another substance. On the back of that worksheet we were asked to identify mixtures, pure substances, compounds, and elements when we were given 4 pictures. This gave us a better understanding of what the particles represented when there were more than one kind, or when they were connected in a different manner.
Finally, we learned about Avogadro's Hypothesis. This hypothesis states that gases (at the same temperature and pressure) reacted in simple integer volume ratios. Meaning that as a conclusion, 2 molecules of hydrogen combine with one molecule of Oxygen to form water works only if we assume that each volume of gas contains the same number of particles. We were then asked to represent molecules in diagrams to show our understanding. This concluded the week of learning and as we move on from here, I am excited to see what we are going to learn.
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