_______________________________________ ABSTRACT The experiment aimed to determine the equilibrium constant Keq of the formation of Fe(SCN)2+ from Fe3+ and SCN- in the equation Fe3+(aq) + SCN-(aq) ⇌ Fe(SCN)2+(aq)‚ through spectrophotometric analysis. Acidified solutions (using 0.1 M HCl) of FeCl3 and KSCN were prepared for the calibration of the UV-Vis spectrophotometer (using standard solutions) and the determination of Keq of the Fe(SCN)2+ formation (solutions with unknown concentrations)
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Introduction In this lab‚ the density of 20 glass beads were determined using two different methods and the results were compared to see how close the values were to each other. In first method the volume of each individual bead was measured using the diameter of each bead‚ along with the mass. In the second method the beads we treated as a whole unit. The total mass was measured and volume was measured based on the amount of water that was displaced in a graduated cylinder. Then‚ the beads
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Identification of Metallic Ions Pre Lab Questions: 4pts 1. What are the learning goals of this experiment? To perform and observe the flame tests of some alkali and alkaline earth metal ion 2. Define ground state and excited state of an atom. Ground state- normal configuration of the electrons about the atom or the ion of an element; stable particle electrons are at lowest possible energy level Excited state- when stable particles are heated to very high temperatures some of the electrons leave
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Case: Curled Metal Inc. (CMI) Introduction Curled Metal Inc. originally sold metal as a finished good but has later developed its business concept to transforming metals into high value added manufactured products. Early in 2008‚ the company was about to launch a new product‚ which could revolutionize its business‚ setting a new standard in the pile-driving market: CMI cushion pads. However‚ this product launch poses key strategic issues to the company‚ ranging from assessing manufacturing capacity
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Electric Can Opener shipments are as shown below: MONTH TIME PERIOD ACTUAL VALUES 3 Month MA 5 Month MA JAN 1 200 Feb 2 135 Mar 3 195 April 4 197.5 May 5 310 June 6 175 July 7 155 Aug 8 130 Sept 9 220 Oct 10 277.5 Nov 11 235 Dec 12 1. 3 Month Moving Averages: The forecast for April is average of Jan‚ Feb and Mar shipments‚ =(200+135+195)/3‚ enter D5=SUM(C2:C4)/3 in EXCEL file. Copy and paste this column. So‚ forecast for Dec. shipments is 244
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Exercise 3: Neurophysiology of Nerve Impulses Worksheet Assignment Due: Week 4 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Please make sure that your answers are typed in RED. Please type your Name and Student ID Number here: Charles Coon 4048223 Eliciting a Nerve Impulse Activity 1: Electrical Stimulation
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effect of heavy metals lead and cadmium (0.05 mM and 0.3 mM) on growth and antioxidant enzymes of seedlings of 2 mung bean genotypes (NM 19-19 and Azri mung-2006). Results revealed that germination percentage and seedling length decreased when compared with the control for both genotypes. However‚ seedling length and germination percentage was better in NM 19-19 as compared to Azri mung-2006. Elevated levels of protein were observed under metal stress in both genotypes. Heavy metals induced oxidative
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potential. 3. 4. 5. K+ is more permeable than Na+ in a resting neuron. This is because there are few sodium leakage channels. 6. Since the resting membrane potential is the potential difference between the inside and outside of the cell across the membrane‚ a change would depend on the resting permeability of the membrane to ions. Activity #2 1. 2. Graded potentials can be said to be momentary‚ localized changes in the membrane potential that can be either depolarizing or hyperpolarizing. 3. In the
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IMP 2 POW 3: Divisor Counting. I. Problem statement: This POW is all about finding information and patterns about the way divisors of certain numbers are found and expressed. In this POW when we talk about divisors we usually are counting the number of divisors that a number has. The divisor is a number that a number can be divided by‚ of course every number is divisible by every other number but in these problems we are only talking about whole‚ positive numbers. Every number is divisible evenly
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Mechanism 4 shows the debromination of 2α-bromocholestan-3-one to give 4. This mechanism which is similar to a Favoskii rearrangement‚ is likely to go via this path as other research has shown that there is often a by-product with this reaction. The by-product is cholest-4-en-3-one which requires the intermediate seen in the third molecule in the above mechanism. The intermediate is highly strained and with the presence of base a proton will be extracted which aids the collapse of the three membered
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