Constants Reports Samples For Students

Introduction

The kinetic characteristics are important for the design of chemical engineering processes. They allow assessing the time required for the reaction and choosing the temperature range suitable for the reaction.
The reaction path is observed by measurments the transmittance of the Crystal Violet solution that reacts with sodium hydroxide. The concentration, and the color of the solution changes with the reaction flow, and this is measured by the spectrophotometer.

The data are plotted as concentration - time and logarithm concentration time, and the reaction rate is:

Rate = [Crystal Violet] [Sodium Hydroxide].
Using the excess concentration of one of the reagents, the reaction rate with respect to the other reagent is found from logarithmic plot (Rahul & Chakrabarti ...

Abstract

In this experiment, benzene was treated with hydrogen in the presence of Pt/SiO2 as an example that can be applied on industrial operations to show that the most recently modernized methods of neutron total scattering that cover a wide Q-range allow the use of appropriate catalytic chemistry that can be measured on time domain to probe directly on site the hydrogenation of benzene within the catalyst pore. Based on this method, it is possible to study the rates of reaction on length scales that can provide measurements equivalent to the size of an atom or a nanometre. Furthermore, the ...

EE 2010L Circuit Analysis Lab Name : TA : Partner: Introduction: In this lab we studied about RC circuits, RL circuits and time constants. We constructed two RC circuits with the given resistors and capacitors connected to the frequency source. And we measured voltage across the resistors and capacitors, using the oscilloscope the time constants of the capacitors are also measured. The time constant of the capacitor is defined as the time taken by the capacitor to get charged through the resistor. Time constant of a capacitor can be calculated using the equation T=RC . In this equation T is the ...

The main objective of this experiment is to observe “slow” transient voltages in a long time constant RC circuit using a multimeter and to observe “fast” transient voltages in a short time constant RC circuit using an oscilloscope.

Materials and Equipment:

- Variable voltage DC power supply (0-20 volts, 0-1.5 amps)
- Digital multimeter (DMM)
- Decade resistance and capacitance box
- 50 µf, 100 µf capacitors (rated 20v or higher)
- Carbon film resistors: 1MΩ
- Single throw, double pole switch
- Oscilloscope & AC function generator or myDAQ Module, PC with Multisim

THEORY

A capacitor is made up of ...

Introduction

During the Solubility Product experiment you calculated the Solubility Product, Ksp, for calcium hydroxide, an ionic solid that is sparingly soluble in water. This was achieved by titrating a saturated solution of Ca(OH)2 prepared at a certain temperature. The saturated, aqueous, solution of Ca(OH)2 is represented in equation form as shown below.

The equilibrium expression for calcium hydroxide is shown below.

Ksp = [Ca2+][OH–]2 Eq. 1
Equilibrium constants are temperature-dependent and the value of an equilibrium constant can be related to temperature and the Gibbs Free Energy, Gº, through the equation:
∆G°=-RTlnK Eq. 2
In this case we can substitute our ...