Chemistry 2202 Review Final Exam Chapter 2: The Mole 1. Isotope – atoms of an element that have the same number of protons but different numbers of neutrons. Ex. The three forms of oxygen are called oxygen-16‚ oxygen-17‚ and oxygen-18. They all have 8 electrons and are written as 16/8 O (8 protons + 8 neutrons)‚ 17/8 O (8 protons + 9 neutrons)‚ and 18/8 O (8 protons + 10 neutrons). 2. 3. Mass Number – the sum of the protons and neutrons in the nucleus of one atom of a particular
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…………………………………………………………………………. 12 Chemical Changes Experiment 3 …………………………………………………………………………. 15 Classification of Matter Experiment 4 ………………………………………………………………………….17 Chemical Nomenclature: The Language of Chemistry Experiment 5 ………………………………………………………………………….22 Water of Hydration Experiment 6 ………………………………………………………………………….25 Gases Experiment 7 ………………………………………………………………………….27 Oxygen Experiment 8 …………………………………………………………………………
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1 Class XII Chemistry Ch 5: Surface Chemistry Chapter Notes Top Concepts / Key learnings: 1. 2. 3. 4. 5. 6. Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption. Adsorbate: The substance which is being adsorbed on the surface of another substance is called adsorbate. Adsorbent: The substance present in bulk‚ on the surface of which adsorption is taking place is called adsorbent. Desorption: The process of removing an
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* Introduction to Organic Chemistry Understand the basis of drawing organic structures Depicting 3-D structures in 2-D Most organic compounds have a three-dimensional structure. How do we represent structures on our two-dimensional page? For example‚ methane is a tetrahedral molecule: Bonds in the plane of the paper: Bonds coming towards the observer: (out of the page) Bonds going away
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A student was assigned a certain task by his teacher in chemistry lab. During the experiment‚ student dropped the flask containing 250 ml‚ 3 molar NaOH solution. Due to this 50 ml of solution out of 250 ml‚ had fallen on the floor. Thinking that teacher may punish him for this mistake‚ he replenished the left over solution with 50 ml of water. The new molarity of NaOH solution will be. (A) 2M (B) 3M (C) 2.5 M (D) 2.4 M 2.* Which of the following molarity values of ions in a aqueous solution
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4 = 6.9/ 7 * The atomic mass is the mean of all the isotopes of Lithium in nature; round the number * Isotopes of a specific element have a varying number of neutrons * The number of neutrons do not affect the chemistry because they are not electrically active; neutral * Mendeleev organized the elements according to their atomic mass but today we organized them according to their atomic number * Staircase line separates the metals from the non-metals
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Why should we study Chemistry? Well I’ll tell you why I think I would study Chemistry‚ why it’s so important and crucial to know and understand. A couple reasons why are that I want to become a doctor in the future‚ I can see Chemistry in life‚ and I want to make a difference in the world. Can’t you agree that Chemistry is everywhere you look‚ I would definitely say so? Clearly‚ then we can see Chemistry in our daily lives. Just stop and look around you sometime. Look at a car for instance‚ you
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I waited patiently by the bench in what all Harvey Mudd chemistry majors call the "Super Lab‚" staring for what seemed to be hours at a small flask bubbling with something that looked like a cross between Pepto-Bismol and whipped cream. I was waiting for the color to turn just the right shade of blue before I could go home for a late dinner‚ but it was obvious that this solution was as far from blue as baseball is from rugby. I realized then that "Super Lab" was not so Super‚ and neither was a career
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Role of Chemistry in Every day Life Chemistry has played a key role in determining the nature of the modern world. In reality chemistry is much interesting for both study and practice. While defining chemistry let us consider a traditional definition which states ’Chemistry is the science of matter which undergoes changes during chemical reaction’. But in reality chemistry goes beyond its traditional definitions. From the evolution of mankind itself‚ chemistry had a close connection with the daily
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importance of chemistry in biology. Chemistry is an important part of biology. Modern biology overlaps with chemistry in explaining the structure and function of all cellular processes at the molecular level. Chemical principles are important in modern cell biology because all living cells are made up of chemicals and many chemical processes occur in various living organisms. In biology you learn about living organisms and their composition. Organisms are alive because of chemistry. Chemistry is the
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