TITLE OF EXPERIMENT 2 : DILUTION 2.1: OBJECTIVES Upon completion of this experiment‚ students should be able to: 1. determine the concentration of coloured solution such as FeCl3 by using dilution and colour differentiating (colorimetric) techniques. 2.2: INTRODUCTION Concentration can be expressed in many different ways such as percentage volume and percentage weight etc. In laboratory‚ normally concentrations were expressed as molarity and normality. Molarity is the
Premium Concentration Chemistry
’Neil 2002). The particular conditions that had to exist for this to apply were that the population had no mutation‚ had no natural selection‚ was a large population‚ had only random mating‚ and had no migration. For the cases to follow later in the lab‚ Cases 1 and 2 exemplify Hardy-Weinberg conditions. All of the others either have selection or not enough members in the population‚ which will be the most-closely observed
Premium Biology Experiment Evolution
EXPERIMENT NO. 1 INTRODUCTION TO LAB INSTRUMENTS. 1. BREADBOARD We should be familiar to the following things about a breadboard: * What is a breadboard and what is it used for? * How does it work? * Setting Up. * Limitations. What is a breadboard and what is it used for? A breadboard (or protoboard) is usually a construction base for prototyping of electronics. The term "breadboard" is commonly used to refer to a solderless breadboard (plugboard). It was designed by
Premium Voltage Direct current Alternating current
OLD COINS TURN TO GOLD DESIGN: Problem or Research Question: How does zinc effects the color change in a copper penny? Hypothesis: If copper and zinc comes together‚ then it will form brass‚ which gives gold color to copper penny. Variables: There were no variables at this experiment PROCEDURES: Materials: Zinc (SN) filling‚ 3M NaOH solution‚ Copper penny‚ tongs‚ Hot plate‚ 100 ml beaker‚ 250 ml beaker‚ Bunsen burner‚ Water‚ Spoon. Procedure: First‚ we turned on the hot plate.
Premium Zinc Primary color Copper
Exercise 25 Special Senses: Hearing and Equilibrium Answers to Pre-Lab Quiz (pp. 383–384) 1. three 2. a‚ auricle 3. tympanic membrane 4. d‚ stapes 5. a‚ cochlea 6. otoscope 7. b‚ Rinne 8. b‚ internal ear 9. macula/vestibule 10. c‚ involuntary trailing of eyes in one direction‚ then rapid movement in the other Answers to Activity Questions Activity 4: Conducting Laboratory Tests of Hearing (pp. 387–388) Acuity Test The threshold is indefinite. Sound Localization No‚ the sound is less easily located
Premium Auditory system Ear Cochlea
Enzymes Lab Report Inroduction In this lab we explore an enzymes activity and how it can be affected by changes to its environment. An enzyme is a protein and is a catalyst to chemical reactions. It helps accelerate reactions by lowering the activation energy‚ which is needed for reactions in cells to progress at a higher rate. Activation energy is the minimum amount of energy needed for a chemical reaction to occur‚ yielding products from a given set of reactants. (Unit 7: Enzymes lab) Products
Premium Enzyme
Alka-Seltzer Rocket Formal Lab Report Abstract In the Alka-Seltzer Rocket lab one was to experimentally determine how much (grams) Alka-Seltzer and water in mL‚ is needed to launch the rocket the highest/longest distance in cm. Also to experimentally determine the % NaHCO3 in the tablet using the information from the highest/longest distance. Calculate the error and % error of NaHCO3 in an Alka-Seltzer tablet and to determine the limiting reagent for the highest/longest distance traveled. Alka-Seltzer
Free Acetic acid Sodium bicarbonate Vinegar
Exocytosis Lab Report Rough Draft Abstract: In Paramecium caudatum‚ trichocysts are 10^3 secretory vesicles that are released from the cytoplasm. We first observed how the presence of Alcian blue dye triggers normal secretion of trichocysts‚ and we then tested four different hypotheses in order to determine how the presence of Ca++ ions in the extracellular and intracellular environment affects the secretion of trichocysts. Our first our hypothesis tested whether extracellular calcium is
Premium Cell membrane Cell Plant morphology
Minerals 1. List the 8 elements which make up about 98% of Earth’s entire mass. 2. The most abundant element in the Earth’s interior is __________________ (fill in the blank). The Second most abundant element in the Earth’s interior is __________________ (fill in the blank). 3. The most abundant element in the Earth’s crust is __________________ (fill in the blank). The Second most abundant element in the Earth’s crust is __________________ (fill in the blank). 4. List the 8 elements which make up
Premium Plate tectonics Sedimentary rock
Chp 7 pp 125-141. San Francisco‚ California Marieb E.‚ Mitchell S.‚ (2009) Cell Transport Mechanisms and Permeability: Computer Simulation. Pearson Education. Human Anatomy & Physiology Lab Manual. Chp. 5th pp 53-63. San Francisco‚ California Marieb E.‚ Mitchell S.(1995)Human Anatomy and Physiology Physio-Ex Retrieved july 4 2010. From web site: http://wps.aw.com/bc_marieb_aplabs_9/58/15037/3849530. cw/index.html
Premium Diffusion Osmosis Semipermeable membrane