Acid Base Titration Purpose: The purpose is to calculate the molarity of a NaOH solution by titrating the base with 5mL of standard HCl solution in each trial. By adding the base with unknown molarity to the acid with 0.10M the molarity of NaOH can be calculated. The base‚ NaOH‚ helps bring the pH of the acid‚ HCl‚ closer to seven‚ which neutralizes it. When using the buret the amount of NaOH used is able to be determined. Then by writing a balanced chemical equation and using the titration
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Physical and Chemical Change Objective: Recognize and distinguish between chemical and physical changes. Materials: - lab balance - microspatula - lab burner - dropper pipet - 5 test tubes - mortar and pestle - test tube rack - magnet - test tube holder - insulating pad - watch glass - safety goggles - glass square - lab apron or coat - copper sulfate pentahydrate - iron fillings - sodium chloride - magnesium ribbon - hydrochloric acid - paper
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reaction equation is as follows: Rate of reaction = k [H202]M [I-]N The value of m and n will be calculated from the various runs of the experiment holding either H202 at constant concentration or holding I- at constant concentration Experiment: My lab partner and I first assembled the apparatus that we were to use according to the sample that was used to show us how to conduct the experiment. We added room temperature water into the leveling bulb and filled until the bulb was about half way filled
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Exercise 1: Cell Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Molecules need a carrier protein to help them move across a membrane because Your answer : a. they are not lipid soluble. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down
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Helicopter Lab (Print and Due Monday) Problem: If we change the length of a paper helicopter’s wings‚ what length of wing will make the helicopter fall slowest? Hypothesis: If we increase the length of a helicopter’s wings then it wall fall slower because the wings will spin slower. Procedure: Materials: • Scissors • 3 Paperclips • Stop Watch • Ruler (metric) • Helicopter paper template(5cm X18cm) Step by Step: 1.) Gather Materials
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island (Wallace). Materials The materials required for this experiment are a computer with internet connection and access to the Evolution Lab‚ which can be located in the BIO/101 student website. Procedures To begin this experiment‚ go to the Evolution Lab located with the University of Phoenix student website. Once at the lab’s page‚ click Start Lab. This will take you to an applet to view and change the inputs for variables. For this experiment‚ the variable inputs on Darwin Island will be
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MATERIAL AND METHODS Stability of cell membrane using pH For the lab experiment for testing the stability of beet cell membranes using pH‚ many materials were used as follows. Obtaining a beet we punch out cores‚ using a cork borer. After washing the cores we put each one inside a separate test tube‚ and added a different pH solution in each one. After 3 minutes in these exposure solutions‚ we took the beet out with a dissecting needle. Then transferred each beet to a separate test tube containing
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Reconstructing a Cow’s Knee Lab Objective: To learn the function of the knee and how its ligaments work to create the movement the knee makes by taking apart the knee and reconstructing it with different materials to replace the ligaments. Hypothesis: If we replace the cow’s knee tendons with rubber bands then it will work like a new knee because the rubber bands will provide the support‚ strength‚ and flexibility it needs. Safety: Wear gloves while handling the knee‚ use precaution when
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record a thermogram. YOU CAN NOW MOVE ONTO THE STEPS TO RECORD AND DETERMINE THE CALORIMETER CONSTANT FOR EACH OF THE 4 PROVIDED CUPS. 1. Obtain two of the same cup types‚ in example two styrofoam cups‚ and a lid from your instructor or the lab stock room to serve as the calorimeter. Nest one cup inside the other to construct
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Iker Lopez Anatomy & Physiology P2 Wednesday‚ September 19‚ 2012 Heart Rate Response to Baroreceptor Feedback Lab Fundamental Question: Does the body respond to its environment? Testable Question: When the body is in the squat position to normal while the time limit stays the same and how far you squat is the same‚ will the heart rate recover after returning to standing position in 10 seconds? Hypothesis: If the body moves back to normal position from squatting position while the time limit
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