Lab Report: Scientific Method Your Name: Alyssa Melincoff Purpose of this Lab What is the goal of this lab? What question is it trying to answer‚ or what problem is it trying to explain? To find out how table salt affects the boiling temperature of water. Hypothesis After reading the lab instructions - but before starting the lab - record your best “educated guess” about what will happen in the experiment. What hypothesis can you generate about the effect of adding salt to water? Adding
Premium Water Scientific method Temperature
How Much Sodium Bicarbonate Is In the Mixture? Lab Investigation 14 Chemistry 113 Lab 10/13/2011 1) Method 1: Adding acid NaHCO3 + HCl → NaCl + CO2 + H2O a) Unknown mixture of NaCl and NaHCO3 Mass of unknown mixture (NaCl + NaHCO3) | 3 g | Mass of HCl | 30 .31g | Mass of products ( NaCl + H2O ) | 26.98 g | Calculate mass of CO2 | 6.33g | Calculate mass of NaHCO3 | 12 .1 g | i) Calculation : Mass of CO2 = [Mass of unknown mixture (NaCl + NaHCO3) + Mass of HCl ] – [Mass of NaCl
Premium Hydrochloric acid Sodium carbonate Sodium bicarbonate
EXPERIMENT 4B: THE MENDELEEV LAB OF 1869 Materials: 30 element cards‚ periodic table Aim: How can we identify elements based on their propeties? Background: Russian chemist Dmitri Mendeleev is generally credited as being the first chemist to observe patterns emerge when the elements are arranged according to their properties. Mendeleev’s arrangement of the elements was unique because he left blank spaces for elements that he claimed were undiscovered as of 1869. Mendeleev was so confident
Premium Periodic table Dmitri Mendeleev
DENSITY AND SPECIFIC GRAVITY Materials and Methods Part 1: Density of an Unknown Solid 1. We first were asked from our laboratory instructor to attain an unknown solid and were asked to note down the number of the solid. 2. Determine the mass of the unknown solid to the nearest 0.001 g and record it in the data table in the back of the laboratory workbook. 3. Then we determined the volume of the unknown solid by water displacement. We first filled a 100mL graduated cylinder about
Premium Density Volume
Preliminary Unknown Report Alexis Grettenberger 800503431 Katie Young Alexis Grettenberger Biol 311 Lab 11/21/14 Preliminary Unknown Report Purpose: The purpose of this experiment was to identify a specific unknown bacterium that was isolated from a multitude of bacteria in a sample of contaminated dirt by running it through a series of identification techniques. Some of these techniques were simple staining‚ gram staining‚ and isolation techniques. The hypothesis of this experiment was that
Premium Staining
How the unknown heroes of the Civil Rights Movement helped organize the March on Washington December 1962: « Things aren’t moving fast enough‚ Martin. »‚ [Bayard] Rustin sighed‚ stubbing out his cigarette in the ashtray. Martin [Luther King Jr] could almost hear the disappointment in his voice. Rustin would never say it explicitly – he was too respectful and tactful - but Martin could sense it. They have known each other for six years now. Rustin helped organize the Montgomery Bus Boycott that
Premium Civil Rights Act of 1964 Martin Luther King, Jr.
Shakira Jarvis Microbiology Lab Assignment Laboratory Assignment Outline 1. Check in & The Microscope a. Review of proper lab etiquette. i. Review laboratory syllabus and b. Review of the Parts of a Microscope ii. Review of lab exercises about different types of Microscopes 2. Survey of Microorganisms c. Viewing‚ drawing‚ and describing several types of fungi‚ algae‚ and Bacteria iii. Chlamydomonas iv. Spirogyra
Premium Bacteria Microbiology Agar plate
The aim of this experiment was to calculate the concentration of an unknown solution of Sodium Hydroxide (NaOH) by titrating it with Hydrochloric Acid (HCl) and to identify any possible sources of error. A colour change from pink to yellow signified the end of each individual titre as the NaOH had been neutralised. Experimental: Method: Firstly two solutions were prepared to show the colour of the Phenol Red indicator in acid and alkaline conditions. These colours were then used to determine the
Premium Sodium hydroxide Chemistry Base
The Relation of Antiseptics and Bacteria Growth Purpose: To explore the effectiveness of different levels of concentration of antiseptic and antibacterial products’ prevention of bacterial growth. Question: Amongst common household products‚ which antiseptic and level of concentration is more effective at inhibiting the growth of bacteria? Introduction: Antiseptics are antimicrobial substances used on living tissue to reduce the possibility of infection‚ putrefaction or sepsis. The word “anti”
Premium Bacteria Immune system
BSC 2085C Anatomy and Physiology I Lab 1: Anatomical Orientation Directions There are three (3) activities in this lab. Please be sure to complete them all. For all questions‚ type your answers into the yellow box ____ (including your name above) it will expand as you write. Activity 1: Anatomical Orientation Go to the website: University of Michigan: Medical Gross Anatomy[->0] Choose the link to the Learning Module entitled Anatomical Orientation. Read the 9 pages and answer the
Premium Anatomy Human anatomy