substances react when the equilibrium has been distressed. Objective: You will observe the application of Le Chatelier’s principle by observing the effects of acids and bases of on the solubility of Ca (OH) 2‚ the effects on Fe3+ and SCN- with Fe (SCN) 2+ to an equilibrium mixture. Also‚ finding the effects of an acid and base dealing with an indicator‚ and the effect on an acid on Ni2+‚ NH3‚ and Ni (NH3)62+. Data and Data Analysis: • Ca(OH)2 [pic] Ca2+ + 2 OH-
Premium Acid Chemical reaction Base
between the Ferric Ion (Fe3+) and the Thiocyanate Ion (SCN-) was determined. After measuring the absorbance of the Ferric Thiocyanate‚ and carrying out some calculations; it was determined that Kc=130.81M Introduction: Chemical equilibrium is established when a reaction exists in a state where the forward reaction rate is equal to its reverse reaction rate. The overall reaction of this exercise is as follows: Fe3+(aq) + SCN-(aq) Fe(SCN)2+ In this occasion‚ the color intensity of Ferric
Premium Chemical equilibrium Chemical reaction Sodium chloride
Mini - assignments for biological rhythms 1. Outline what we mean by an endogenous pacemaker (3) Endogenous rhythms are rhythms that aren’t imposed by the environment but generated from within the organism. Since many of our biological cycles follow an approximation 24-hour rhythm‚ even in the absence of external stimuli‚ it follows that there must be some kind of internal biological clock. 2. What is the name given to external events that play a role in rhythmic activities? Give
Premium Circadian rhythm Sleep Menstrual cycle
standard solutions of known concentration was measured and graphed to determine the absorptivity coefficient. This coefficient was then used to calculate the actual concentrations of the FeSCN2+ complex. Having the initial concentration of Fe3+ and SCN- ions along with the complex‚ the equilibrium constant can be determined. INTRODUCTION The equilibrium constant (Keq) relates the concentrations of the reactants and products in a reaction in equilibrium. However‚ the Keq cannot be determined
Premium Chemical reaction Light Concentration
The suprachiasmatic nucleus (SCN) is the pacemaker of the biological clock in the sleep–wake cycle. The SCN generates its own innate biological rhythm due to protein synthesis. It is connected to the optic chiasm and so receives input about the amount of light (an exogenous or external factor)‚ which also influences the rhythm. Therefore‚ light stimulates nerve impulses which travel from the eye‚ along the optic nerve to the brain. The pineal gland is linked to the SCN by a neural pathway and so the
Premium Circadian rhythm Sleep
meeting time] TA: [Fill in the lab TA’s name] INTRODUCTION In this experiment I calculated the equilibrium constant for the reaction shown below under different conditions to determine if the equilibrium constant is really constant. Fe3+ (aq) + SCN– (aq) ←→ FeSCN2+ (aq) A big part of this lab includes understanding (and in the end proving) that absorbance is directly proportional to the concentration of a solution (Beer’s Law)‚ and if Absorbance v. Concentration is graphed‚ a straight line
Premium Chemistry Chemical reaction Chemical equilibrium
Lab: 5 Experiment:13 Pre-Lab The purpose of this experiment is to observe an equilibrium reaction counteracting changes to it’s system all in accordance to Le Chatelier’s principle. An equilibrium reaction can be pushed toward products or reactant based on changes in temperature or concentration. The reversibility of reaction will also be looked at. Pre-Lab questions 1. The concentrations of products and concentrations of reactants remain constant but both reactions
Premium Color Acid Hydrogen
Sundowning Syndrome Etiology and Treatment 12/3/2010 Anatomy & Physiology sundowning syndrome: etiology and treatment An escalation in disruptive behaviors in the late afternoon and early evening among institutionalized patients suffering from dementia and Alzheimer’s disease has been a recognized phenomenon for over 60 years (Bachman & Rabins‚ 2006). The timing of the onset of disruptive behaviors has led to calling this phenomenon sundowning‚ sundowning syndrome‚ and nocturnal delirium
Premium Circadian rhythm Sleep Dementia
1. Describe how circadian rhythms are associated with sleep deprivation. 2. Explain the results of the sleep deprivation assessment. 3. Do you agree‚ or disagree‚ with the results. Why‚ or why not? 4. If you are sleep deprived‚ what steps could you take to get more or better quality of sleep? Alternatively‚ if you are not sleep deprived‚ what techniques allow you to get quality sleep most nights of the week? Circadian rhythms: Their role and dysfunction in affective disorder Press
Premium Sleep Circadian rhythm
INFRA-RED FLAME DETECTION 123 S200+ SERIES TRIPLE IR FLAME DETECTORS USER MANUAL S200+ USER MANUAL INDEX PAGE A) INTRODUCTION 1 1. 1 Flame Detection Operation 1 3. B) Introduction 2. General Construction 4 PRODUCT APPLICATION 5 1. C) Application 5 2. Benefits of the S200+ Series 6 8 Introduction 8 2. Electrical Characteristics 8 3. Mechanical Characteristics 13 4. Environmental
Premium