Laboratory Techniques & Measurements Essay

When the pH is not at its optimum, the differing pH's will disrupt the bonding between the R groups of the amino acid causing its structure and the shape of the activation site to change

Purpose: To learn about the international system of units (SI), to become familiar with common lab equipment and techniques, to gain proficiency in determining volume, mass, length, and temperature of a variety of items using common laboratory measurement devices, to learn to combine units to determine density and concentration, and to use laboratory equipment to create serial dilutions and determine the density and concentration of each dilution.

The United States has to reconfigure the measurement of goods due to not using the metric system.

7.The air dried filter paper was then placed on the weighing scale and results were recorded

Procedure: Using distilled water, premeasured containers and objects determine displacement of fluids and density of objects. Use ice and heat measure temperatures in Celsius, Fahrenheit and Kelvin.

Be sure to enter your trial volumes in the corresponding order that you entered your masses of your bleach

Paragraph 1 - How the Law of Conservation of Matter is supported by the experimental demonstrations: In the law of conservation particles and materials are neither created nor destroyed . It was similar towards the experimental demonstrations because nothing changed or destroyed in the processes .Kinetic and potential energy was used in the experiments.

groups. It was conducted to further the research in choice overload and paralysis of the mind.

Using Gravitational Force as a Measurement Tool Answer the following questions about the results of this activity. Record your answers in the boxes. Send your completed lab report to your instructor. Dont forget to save your lab report to your computer Activity 1 Record your data from Activity 1 in the boxes below. Enter the data for the sample you used in each trial (5000 rpm, 10000 rpm, etc) in the appropriate columns and the corresponding g-force, number of layers, and position of layers position results. You will need to use the following formula to assist with your laboratory report G-force 0 00001118 x radius of centrifuge arm x (rpm)2 The radius of the centrifuge arm for this instrument is 10 cm. Speed 5000 rpm 10000 rpm 15000 rpm

Students will carefully observe acts of aggression and prosocial behavior on television, report their observations, and analyze their data to draw conclusions.

2. In order to calculate the density of a solid or liquid sample, what measurements are needed?

It used mass, temperature, length, volume, density, and making a dilute solution. I learned the importance as well as the difficulty of making proper measurements in a lab setting. If one measurement is off, it will throw the entire equation off. This will give either incorrect or inaccurate results.

The purpose of this lab was for the student to get involved with his or hers new lab kit as well as being able to know, identify and use each other tools provided in the kit. Another key learning aspect of this lab is to teach the student how to measure properly the many units in the SI system. I will be using laboratory dilutions, measurements, and weights to then calculate using algebraic formula.

It is also significant to tare the scale to zero when obtaining the weight of certain objects. For instance, I had to tare the scale after I put a beaker half full of water on the scale; by doing this it keeps the weight at 0.0g, then I submerge the object to retrieve the volume. Exact measurements are essential. One must be aware of the upward curve of liquids in the graduated cylinder, and always measure the low point (bottom) of the meniscus. It would be of good practice to measure at eye level, thus insuring a more accurate and precise measurement. In addition, I had to make sure that I used the pipet as opposed to just pouring from a beaker or flask. This also guarantee a more accurate reading, accuracy and precision is vital in measuring.

Laboratory technique 6 explains how to accurately measure an amount of a substance for use in calculations by using a scale tared to the mass of a weighing paper, before adding the object to be weighed (Beran, 2014). Two other techniques that are relevant to this experiment are 9 and 16a, which respectively describe how transferring small quantities of solids, such as the unknown, should be done by dispensing the substance into the cap of the reagent bottle before taking it elsewhere in order to avoid any excess of it, and how the volumes of liquids, such as cyclohexane, should be read at the bottom of the meniscus in order to maximize accuracy (Beran,