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Matter, Periodic Trends, and Bonding

This is presentation to show what I have learned this unit and how it benefits me for future planning.

David Lam

on 23 January 2013

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Transcript of Matter, Periodic Trends, and Bonding

Grade 11 Chemistry Matter, Periodic Trends, and Bonding unit There has been many things that have been learned in this part of the unit. We started off doing review but not long after we started to learn about how to calculate average Atomic mass of an element. A formula was given to be able to find the average. Atomic Mass and Matter I have had a lot of practise with this and have even done a lab which involves weighing pennies and finding Average Atomic Mass of the pennies. I did well on that lab getting 18/20 or 90% Atomic Mass This part of the unit involves a bit of simple mathematical word problem and solving knowledge. In grade 12, the science word problems are expected to be even more difficult than in this grade which makes it good for preparing for grade 12. How Isotopes and Average Atomic Mass Prepares me for Grade 12 How Average Atomic mass relates to the habit of mind? This was a tougher part in the unit in which I learned a lot about. The first part of it was easy. I learned about the bonds regarding electronegativity. Covalent bonds ranges from 0-0.4 and it was basically 2 elements with high electronegativity subtracted. Polar Covalents having numbers from 0.5-1.7 and ionic bonds having an electronegativity number from 1.8+ and basically having an element with a high electronegativity- low. I went on to do well on the quiz and test for this part. Ionic, Covalent, and Polar Covalent Bonding We went on to learn each of them seperately and how they are different with electron bonding and in other characteristics. We did 2 different labs. The first lab where we tested compounds out to see the characteristics for each of them (Ex. Solubility, conductivity, melting point, and hardness) to see which one matches with which bond. The second lab showing polar covalent bonds with uneven sharing. Ionic, Covalent, and Polar Covalent Bonding As I've said earlier, this is one of the tougher parts of the unit where I really need to understand to do well in this unit. At first I did not know much about this unit. During the test, I've had some struggles but overall did well on that section. The reason for choosing this In this grade we are learning the simple concepts of bonding. In grade 12, there is a course with even more complicated bonding. This includes the bonding and charges which are completely different from this unit. I would need to remember the basic concept which is this unit to prepare for grade 12. How Ionic the Bonding helps me
in grade 12? I showed a habit of presisting. When the teacher first started teaching bonding, I did not get get it. I tried different methods of trying to learn the lesson. I never gave up on trying to learn bonding. In the end, I have had my struggles with bonding but I understood the whole concept of bonding clearly. How Bonding relates to the habits of mind? I chose this because I really did well on this topic in the unit (Average atomic mass and Isotopes) and I easily understood the concept fully and the lab showed it. I eventually went on to get perfect on that part on the quiz and test. Why I chose this? This relates to the habit of applying Past Knowledge to Novel Situations. The process of substituting and re-arranging equations in grade 10 Math. That really helped me in understanding the process easily since I liked the subject math and especially the unit of substituting formulas. Chemical Reactions Displacement Reactions This unit started with reviewing grade 10 displacements. As we learned about the 5 displacements (Single/double displacement, synthesis, decomposition, and combustion) we got deeper into learning each reaction ie, No reaction for single displacement and double displacement (Based on a solubility chart). Single Displacements The first lab we did was an experiment with chemical reactions. We had to predict the chemical reaction of the products and find out which compounds had reactions. The reactions were all single displacements in the end. We would then take the products that reacted which were the single displacements and balance them. I clearly understood the concept of the lab and did really well on that lab getting a mark of 28/32. Why I chose this I understood both knowing which chemical reaction it was when being given the equation and balancing the chemical equations after. The labs were really easy to understand. Eventually, the test came and I did good on that section getting perfect on it. How Displacements help
prepare for grade 12 In grade 11 chemistry, we learned how to find chemical reactions and how to balance them. In grade 12, we would already need to know how to do the balance part when doing labs and know how to predict and find reactions for grade 12 chemistry experiments. Habits Of mind This would relate to the habit of thinking interdependently which is team work. In that lab that me and my partner did, we did our fair share of work and where ever we had problems in the lab, the partner would help out the other. Without teamwork we wouldn't have gotten that high of a mark in that lab. Organic Chemistry We needed to learn the types of organic chemistry in order to get the last reaction which was combustion. There are 8 main function groups with unique differences in organic chemistry. They include: Alcohol, Ether, Aldehyde, Ketone, Carboxylic Acid, Ester, Amine, and Amide. Others include Alkane, alkene, and alkyne.

We had to find out and work in a group to find out their unique differences of each type of organic chemistry. Why I chose this In this unit, the group assignment that was done was a struggle. In the end though, the group overcame earlier issues and we worked together to finish the assignment which was finding the rule of each function. I continued to practice with worksheets from the homework Mr.Griffith assigned and doing mastery Tests. The result was perfect on that section as well on the test. How Organic Chemistry prepare me for grade 12. How Organic chemistry relates to the Habit of mind This unit for me was related to listening With understanding & empathy. Our group was not cooperating at first, but we started to understand each other's ideas and in the end, the assignment was a success. Organic chemistry is huge part in the chemical reactions unit. If you did not know how it works, then you would not be able to solve the combustion reactions. In grade 12, we would learn more about Organic chemistry and it will build on the knowledge we learned this year. Quantities in Chemical Reactions In stoichiometry, we would combine all the things in the unit we have learned (blancing equations, mole ratios,converting into mass, moles, and molar masses. a mass of a compound would be given and we would have to find the mass of another compound. A table is made to simplify and help solve the problem Stoichiometry Reaction Stoichiometry lab The purpose of this lab was to find the mole ratio of the chemical reaction using stoichiometry. This lab was more of a challenge to finish because of the many mistakes and problems we had and made during the lab. Although we made a lot of mistakes, we still managed to finish the lab with and get a really good mark of 17/20. Why I chose this Although we had problems with the lab, me and my partner showed determination and did not give up on the lab even though we thought we thought we were not going to finish. This was mainly important because it combined all the things we learned in the unit and puts it all into one concept. You really needed to know all the previous concepts building up to this to understand. In the end, I reviewed and got how to do stoichiometry and got perfect on that section of the test. How stoichiometry prepares me for grade 12. The grade 11 concept only introduces the stoichiometry. By the end of grade 11 and at the beginning of grade 12, we are expected to be able to use stoichiometry when they give a problem that gives u the mass of a single/double displacement reaction. Habits of mind The best habit of mind that i can relate the stoichiometry part of the unit was thinking interdependently. The lab was a perfect example of that. Even though we made mistakes in the lab, we still wound up finishing the lab due to good team work to speed up the process of the lab. Percentage Yield This was an important part of the unit. This was finding how accurate your lab was. To find percent yield, a formula is used to help you find percent yield. This explains how accurate your lab is. In most cases, labs will not be 100% accurate. The mass of the product which was taken from the lab (actual yield) would be divided by the calculated mass of the product (Theoretical yield) and would be finally multiplied by 100 to get the percent accuracy of the experiment. Percent Yield In this lab, we would take the lab we did (To determine percent yield by filtering the water from the product) and change one step. You would get a better percent yield as the result by doing this. Why I chose this Lab This was another lab that I had problems with my partner at the beginning. Our problem was that we could not think of a change in step since everyone had already chosen the step to change. In the end, we thought of a step to change which was simple but smart which was to change the reactants. The experiment wound up being a success. How this Prepares this for Grade 12 When you do a lab in grade 12, you are expected to know that the lab will probably not be 100% accurate which is a really important topic to learn in grade 11. Habits of mind for Percent Yield The best habit of mind that would be taking responsible risks. An example would be the percent yield lab. Most groups only changed one small step in their experiment. Our group took a big risk combining 2 products that not even the teacher has done to find percent yield. Chemistry of Solutions
Dilutions In dilutions, the molar concentration and volume of the compound is given to find mole. The unknown substance would be given a volume or concentration and it would have to equal the moles of the compound. A formula is given being initial volume*conentration = the unknown concentration * volume where either the volume or the concentration is divided depending on the one needed to find. Testing waters lab In a testing waters lab, we were finding the molar concentration of the unknown substance which volume was given. We also had to make our own procedure in this lab and make our own data. Why I chose this. I did not initially do well in this strand. It was important that I changed the way I was thinking in this strand or I would fail on this section of the test. I re-read my notes and kept practicing on word problems for dilutions. I eventually got better at it and when the test came, I got perfect on that section on the knowledge part of the test. habits of mind The habit of mind that relates to this is the thinking flexibility. I did not initially get this at first when we took the note but after looking through the examples and doing the lab which were different ways I learned, I was able to master the skill. Titration In titration (quantitative analysis), is balancing the acid with an amount of volume of a base concentration. The concentration of the base would be given along with the volume of the acid. A table would be made to find the molar concentration of the acid. Titration Lab The first part of the lab was to neutralize the same amount of acid 3 times using a certain amount of base each time. The volume averaged out during the 3 runs. The indicator phenophalein would be added to confirm that it is neutralized. In the end, we are finding the molar concentration of the acid. The second part of the lab is to neutralize the acid and base but using the interface. Why I chose this? I chose the titration strand because it combined what we learned in this unit which was acids, bases, volume, molar concentration etc. It was really important to know all that or you would not get titration. I didn't get this unit at first but that's where this lab experience helped me understand titration. Habits of mind The titration strand relates to the questioning & problem posing habit. Even though I got the right answers to the titration problems, I did not know how it worked. I questioned and found answers for those questions I asked myself. Gases and atmospheres Boyle's Law Experiences This law involved pressure gas and volume where temperature was constant. The relationship is that if either one goes up, the other goes down by that amount. The relationship being P=1/V. The boyle's law lab was the first lab done in the unit. Using logger pro, we would have to determine the relationship between pressure in volume if we add volume. The result is the graph showing an inverse pattern. we would have to divide 1/v to get a constant slope. Why I chose this The following labs in the first strand are really similar to the following gas laws. The first lab was not marked. It was just to get some practise. Unfortunately, I did not do well on the first lab but I knew what I did wrong. It was really important that I knew what I did wrong or I wouldn't do well in the other labs and make the same mistakes. Habits of Mind I used the striving for accuracy & precision habit of mind in this strand. The experience was really important because it made me realize what I was doing wrong in the lab. This strand motivated me set my standards even higher because of my drop in marks. Gas Stoichiometry Experiences The last lab we did this year was the butane lab. We had to determine if the molar mass of a sample of butane gas can be determined using water
displacement. We'd have to weigh the lighter before lighting it under the graduated cylinder where the water level of both the bucket and graduated cylinder had to match. The lighter is weighed again after. Why I chose this I chose the stoichiometry of gases strand because this combined all of what we learned from this semester into one strand. It was the most important strand of all. If I didn't get this, all the other units I learned wouldn't help me at all. Habits of Mind This strand relates to the habit of applying past knowledge to novel situations. This strand is taking all the things you learned and putting it together into one strand. For example, we've been using stoichiometry throughout the year. This is one of many steps we've learned that is used in solving word problems in this strand. Conclusion I have learned a lot throughout the year by doing several labs, worksheets, and even writing a couple of tests. I am looking forward to next year as I am ready for grade 12. Introduction I am here to explain what I have learned throughout assignments and what I have experienced this year. I am also here to explain why I am ready for grade 12 chemistry next year. The End
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