Experiment 19 - Determination of the equilibrium constant for the reaction Fe3+ (aq) + SCN( (aq) = FeSCN2+ (aq) Object: To determine the equilibrium constant by a colorimetric method Theory: Colorimetric methods of analysis are usually applied to the determination of small concentrations of either inorganic or organic materials in a solution. The constituent sought must be coloured or must be capable of reacting with a reagent to produce a substance having a suitable colour. Beers Law‚ which
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authority to monitor their actions and treat them however they chose. This control gave them a sense of freedom and security. But no – this feeling was nothing more than an illusion of freedom and a false sense of security. Henry in The Known World by Edward Jones believed in this false freedom. He was in fact born into slavery on a large plantation with minimal rights and maximum work but he grew to have a strong bond with the master William Robbins. Although he had more privileges than
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A NET IONIC EQUATION EXAMPLE: KCl(aq) + Pb(NO3)2(aq) ( 1. a. Take only one of the first cation(s) and match it with one of the second anion(s). (Write the cation first) b. Take only one of the second cation(s) and match it with one of the first anion(s). (Write the cation first) KCl(aq) + Pb(NO3)2(aq) ( KNO3 +PbCl 2. Correct the formulas of the products based on the charges of the ions. KCl(aq) + Pb(NO3)2(aq) ( KNO3 +PbCl2 ◄ 3. Balance the equation 2 KCl(aq)
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2 Perpetuity The value of D received each year‚ forever: PV = D/r Annuity The value of D received each year for T years: PV = (D/r)*[1 – 1/(1+r)T] Growing Perpetuity PV = D/(R-g) R: the cost of capital‚ interest rate G:growth Growing Annuity PV = (D/(r-g))*[1 – (1+g)T/(1+r)T] Dividend & Stock Price |------------|------------|----------- P0 P1/D1 Pt/Dt Rate of Return of Stock r = (D1 + P1)/P0 - 1 Given annual growth rate g1‚ g2‚ then g3 remained constant forever: Di = Di-1*(1+r)
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PSY 150 IV-DV Exercise * Independent variable – The variable that is manipulated to test its effects on the dependent variable. * Dependent variable – The variable that is measured to see how it is changed by manipulations in the independent variable. Scenarios 1 Coach Jones has noticed that her players tend to shoot a higher percentage from the free throw line when they play away‚ rather than at home. Surprised at this trend‚ she and her assistants decide to test this by
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2. Languages that let you use a vocabulary of descriptive terms‚ such as “read‚” “write‚” or “add‚” are known as _____________ languages. a. high-level 3. The rules of a programming language constitute its _____________. a. objects 4. A _____________ translates high-level language statements into machine code. c. compiler 5. Computer memory locations are called _____________. b. variables 6. The individual operations used in a computer program are often grouped into logical units called _____________
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3-point scale. Let X denote the rating given by expert A and Y denote the rating given by B. The following table gives the joint distribution for X and Y . 4.12 If a dealer’s profit‚ in units of $5000‚ on a new automobile can be looked upon as a random variable X having the density function fx= 21-x‚0<x<10‚elsewhere find the average profit per automobile. 4.14 Find the proportion X of individuals who can be expected to respond to a certain mail-order solicitation if X has the density function. fx=
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studies how to use limited resources and unlimited wanted. Q70. Of the following‚ which one is true? when an independent variable increases and the dependent variable also increases‚ the relationship between the two variables is positive. when an independent variable decreases and the dependent variable increases‚ the relationship between the two variables is inverse. On a graph the direct relationship is upward sloping and the inverse relationship is downward sloping. All of the above
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relationships between variables. For example; could height be related to weight? The report must include: 1. 2. 3. 4. Introduction Methodology Data Analysis Result and Conclusion 1.0 Introduction In your introduction section‚ you should have a briefly introduction about the background of your research. 2.0 Methodology 2.1 Collecting Data Collecting data can be in two ways; get data from your experiment in the lab and do survey! So what you should have in your data? Your variable must be more than
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. To find the PVA‚ we use the equation: PVA = C({1 – [1/(1 + r)]t } / r ) PVA = $60‚000{[1 – (1/1.0825)9 ] / .0825} PVA = $370‚947.84 The present value of the revenue is greater than the cost‚ so your company can afford the equipment. 7. Here we need to find the FVA. The equation to find the FVA is: FVA = C{[(1 + r)t – 1] / r} FVA for 20 years = $3‚000[(1.08520 – 1) / .085] FVA for 20 years = $145‚131.04 FVA for 40 years = $3‚000[(1.08540 – 1) / .085] FVA for 40
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