technique is: Number Moles Concentrated Solution = Number Moles Dilute Solution. An instrument called a spectrophotometer detects the amount of light that passes through the sample and the percent transmittance can be recorded from the meter. In the lab‚ multiple homogeneous solutions are made. There was not a way to determine the differences in concentrations‚ but the Spec 20 made it possible to measure the difference. The Beer-Lambert Law is a graph used to record
Premium Chemistry Concentration Solution
Abstract This lab is performed in order to determine the total energy in a reaction between zinc and hydrochloric acid. The reaction is done twice‚ once to measure the heat of the reaction and again to determine the work done in the system. This is because Enthalpy equals heat plus work (∆H= ∆E+W). Heat and work can be broken down further into separate components so the equation used in lab is ∆H=mc∆T + PV. Many calculations are used in the lab to find out what cannot be measured directly (ex: volume)
Premium Thermodynamics Energy Temperature
Young children‚ drowsiness or arousal in older children and adults‚ idling‚ associated with inhibition of elicited responses. Alpha 8-13 Posterior regions of head‚ both sides‚ higher in amplitude on non-dominant side‚ central sites at rest. Relaxed/reflecting‚ closing the eyes‚ associated with inhibitory control. Beta >13-30 Both sides‚ symmetrical distribution‚ most evident frontally
Premium Electroencephalography Brain Neurology
solutions. Sucrose solution (M) Weight Before (g) ± 0.01 (A) Weight After (g) ± 0.01 (B) 0 4.56 4.31 0.2 4.22 4.28 0.4 4.13 4.08 0.6 4.57 4.45 0.8 4.60 4.39 1.0 4.70 4.52 Distilled water is represented by 0M. Table 2: Amount of sucrose solution (ml) before and after the experiment. Sucrose concentration (M) Before experiment (ml) ± 0.01 (A) After experiment (ml) ± 0.01 (B) 0 150 142 0.2 150 142 0.4 150 143
Premium Chemistry Concentration Solution
Microscope lab report Introduction Microscope is a tool used to enlarge images of small objects that are hard to study with bare eyes. The compound light microscope‚ which is going to be used in this lab activity‚ is an instrument with two lenses and various knobs to focus the image. In this lab‚ we will learn about the proper use and handling of the microscope. Objectives: •Demonstrate the appropriate procedures used while using the compound light microscope correctly. •Make and use a wet mount
Premium Lens Microscope Optics
Lab Report Diffusion is - One of two kinds of passive transport‚ - Diffusion can transport ions from higher concentration to lower concentration region without any other forces. - A net movement of molecules in and out of cell membrane - Diffusion can be affected by the steepness of the concentration gradient. Lab question: Is the rate of diffusion influenced by the presence of second molecule? Prediction: the rate of diffusion is influenced by the presence of second molecule
Premium Diffusion Molecular diffusion Chemistry
Presence of Alu element within PV92 on chromosome 18 in a mixed ethnical population and its connection with humans’ ancestral origins By Shiyu Song Biology 155Q LAB-A: 14:30-17:30 Dr. Jacob April 17th 2013 Abstract The Alu insertion (+) within PV92 on chromosome 16 usually reflects a person’s ancestral origin. This study aimed to find the correlation between the presences of Alu insertion (+) within PV92 on chromosome 16 within a population. We used PCR to detect the Alu insertions
Premium Genetics DNA Gene
* Would yeast produce more carbon dioxide with the presence of sugar at room temperature or in an incubator? | -Observing Cellular respiration in yeast cells. | Yeast Lab Background Information: Yeast is a tiny unicellular fungus that obtains energy from outside sources (a heterotroph) mostly sugars in order to grow and reproduce. Yeast is often used in bread dough to make the dough rise. With the presence of oxygen a yeast cell creates energy by performing cellular respiration and
Premium Yeast Carbon dioxide Cellular respiration
said to be in "thermal equilibrium". Apparatus -1 glass thermometer * calorimeter * stop watch * and hot water Procedure- 1) we took hot water from the lab We put it into a calorimeter and put a glass thermometer into it. 2) We measured the intial temperature to be 81 degree celcius. 3) Then we recorded the temperature every 2 mins. 4) And continued doing so for 30 mins. Controlling the
Premium Temperature Thermodynamics
A. Goal and Purpose: Session 1: In this lab‚ we will achieve a simple Friedel-Crafts alkylation of anthracene. The choice of anthracene as an aromatic substrate stems from two considerations. First‚ there is a question of regioselectivity. Second‚ anthracene and its derivatives are highly visible under UV light. Session 2: In this lab‚ we will complete a partial conversion of 9-acetylanthracene using m-chloroperoxybenzoic acid (mCPBA). We will also determine by NMR‚ the regiochemistry of the
Premium Sodium Chemistry Temperature