BUFFERS By: Luis P. Bazan‚ RPh.‚ Ph.D. A buffer solution is a solution of: 1. A weak acid or a weak base and 2. The salt of the weak acid or weak base Both must be present! A buffer solution has the ability to resist changes in pH upon the addition of small amounts of either acid or base. Consider an equal molar mixture of CH3COOH and CH3COONa CH3COOH (aq) H+ (aq) + CH3COO- (aq) Adding more acid creates a shift left IF enough acetate ions are present 16.3 Which of the following
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oh-so-wonderful day of September 1‚ 2008‚ at 12:49 PM‚ I tried my first ever bite of tortilla chips with queso. I recall the screaming and tantrums that occurred every time we went out to eat. Kicking‚ punching‚ abusing my parents in general. I guess I was just a spoiled kid‚ but I simply refused to eat anything other than
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Potato Chips Jacquelyn opens the yellow bag‚ feeling the smell of the chips engulf her. Then the memories come‚ forcing themselves to the front of her mind. Jackie returns from the kitchen with a bright yellow bag‚ brighter than the morning sun. She grabs the top between her fingers‚ the crackle of the bag alerts Jimmy of what she has. Jackie pulls apart the bag‚ feeling the rush of air towards her face. The smell of cholesterol engulfs her. She reaches in and pulls out one of the golden crisps
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"Assess the arguments for the return of the Parthenon/Elgin Marbles to Greece" The question as to whether or not the esteemed Parthenon Marbles should be returned to Greece or persist in their contemporary locality in the British Museum has been the subject to rigorous debate from historians‚ politicians and the general public alike. The major contemporary arguments supporting the return of the marbles to Greece involve the fact that the Greek government has accepted concerns regarding inadequate
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Higher Certificate in Print Design & Publishing Visual Literacy Phiwokuhle Jobodwana Charles Chip Kidd he was born in September in 1964‚ he is a passionate graphic designer from United States of America. He is best known for his innovative designs on book covers. He was born in Shillington‚ Berks Country in Pennsylvania‚ Chip Kidd grew up being fascinated and he was mostly inspired by American pop culture. His gateway into the industry of graphic design was his comic books. His early childhood was
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are several purposes to the amino acid lab experiment. One reason is to help us understand the concept of acids and bases and how they interact with one another. Another purpose is to understand what occurs when placed with the existence of buffers. Lastly‚ the experiment is to help us understand the applications of titrations and how it can be used in a real world setting‚ in this case‚ the identification of an amino acid. One must understand that amino acids all have special characteristics
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Anna Powell 2nd I.Title: Acid-Base Titrations AP Chemistry Laboratory #6 II.Purpose: The purpose of this experiment is to standardize a sodium hydroxide solution and use the standard solution to titrate an unknown solid acid. The equivalent mass of the solid acid will be determined from the volume of sodium hydroxide added at the equivalence point. The equilibrium constant‚ Ks‚ of the solid acid will be calculated from the titration curve obtained by plotting the pH of the solution versus
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Worksheet - Acids‚ Bases and Salts 1. I am pure water. When heated my pH (increases‚ decreases)‚ because more of my water molecules dissociate. 2. I am a 0.020 M solution of weak acid‚ HA. If I only dissociate to the extent of 1.50%‚ what is the value of my Ka? 3. I am a 0.20 M solution of hydrocyanic acid‚ HCN‚ with a Ka of 4.93 x 10¯ 10 . What is my pH? 4. I am a buffer made from 0.10 M acetic acid and 0.15 M sodium acetate. If the Ka for acetic acid is 1.77 x 10¯ 5 ‚ what is my pH? 5. I am
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ETHERS Classification of Ethers: Symmetrical ethers – two groups attached to O are identical Ex. CH3CH2OCH2CH3 – diethyl ether Unsymmetrical ethers – two groups attached to O are not identical Ex. CH3CH2OCH3 – ethyl methyl ether Physical Properties of Ethers: Ethers have much lower boiling points compared to alcohols of comparable MWs. BPs of ethers increases with increasing MW. BPs of isomeric ethers increase with increasing alkyl chain length. BPs of ethers are about the
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Titration Lab A Titration is a process of the concentration of one solution being determined by its reaction with either a standard solution or a known quantity of solid dissolved in solution. It may also be used to calculate the molar mass of an unknown acid or base. Purpose: I. Prepare a standard solution of sodium hydroxide II. Standardize a sodium hydroxide solution by using potassium hydrogen phthalate (KHP) III. When given whether the acid is monoprotic‚ diprotic‚ or triprotic ‚ determine
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