Chemistry SL Internal Assessment: Enthalpy Change Design Lab Experiment: Reaction of distilled water and solid sodium hydroxide RESEARCH QUESTION How does the heat released during the reaction between distilled water and Group 1 elements (lithium‚ sodium and potassium) vary as one goes down the group? OBJECTIVE The objective of the experiment is to measure the heat change during the reactions with minimal heat loss to the surroundings. MATERIALS The materials to be used in this experiment
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AP/IB Chemistry Internal Assessment Lab Format The following titles and subtitles (in bold) should be used for your lab report and given in this order within your lab report. Title: choose one to fit your experiment I. Design A. Problem – must be a focused‚ clear research question. B. Hypothesis (When appropriate) • Clear answer to Problem – • Logical rational • your conclusion should address the hypothesis you are giving here. C. Variables
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ry SL Chemistry Name______________________________________________ IB Guide to Writing Lab Reports Standard and Higher Level Chemistry 2010-2011 Table of Contents page 1 Explanations‚ Clarifications‚ and Handy Hints page 2 - 13 IB Laboratory Evaluation Rubric page 14 - 15 Formal Lab Report Format page 16 Error Analysis Types of Experimental Errors page 17 Error Analysis: Some Key Ideas page 18 Precision and Accuracy in Measurements A Tale of Four Cylinders
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Lab Design Research question: How does temperature affect on the rate of photosynthesis? Variables: Independent variables: temperature of water where the elodea(plant) is going to be placed Dependent variable: the amount of oxygen produced by photosynthesis reaction Control variables: Light concentration entering the beaker Length of the plant Volume of the water to be precise And of the NaHCO3 What is the variable to be controlled. Why does it need to be controlled. How will you
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Viscosity Question How does changing the temperature (°C) of glycerin affect the viscosity s -1 of glycerin (l)‚ when tested by dropping a marble from a constant height into the glycerin (l) and timed with a stopwatch until the marble hits the bottom? Design Independent Variable: The independent variable of this experiment is the temperature (°C) of the glycerin (l). Dependent Variable: The dependent variable of this experiment is the viscosity s -1 of the glycerin (l). Controlled Variable(s): The controlled
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Using colorimetry to find the order of a reaction introduction Coloured solutions absorb some of the wavelengths in the visible region of the electromagnetic spectrum. A colorimeter can be used to measure the amount of light absorbed by a solution (the absorbance) and this is proportional to the concentration of the coloured species present. In this experiment you will use a colorimeter to investigate the reaction between bromine and methanoic acid:- Br2 (aq) + HCOOH (aq) ↓ 2Br-
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Design Lab Experiment: How would an increase in the atomic radii of the metals in period 4 affect the time it takes for a metal to react with HCl. Hypothesis: If Hydrochloric Acid is dropped on all of the metals in period 4‚ then the elements with the largest atomic radii will react faster with Hydrochloric Acid because atoms with bigger atomic radii are
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IB Chemistry Summary- By Paul Li & Silvia Riggioni TABLE OF CONTENTS Table of Contents............................................................................................................................................................ 1 Atomic Theory................................................................................................................................................................ 3 The Electromagnetic Spectrum.............................................
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Design Research question: This should be a clear focused question that says exactly what you are investigating. It shouldn’t be too long and it must include the dependent and independent variables. Eg. What is the effect of pH on the activity rate of salivary amylase? Dependent variable: activity rate Independent variable: pH Hypothesis: This is a paragraph or two where you explain your research question. You are going to say something like: "Salivary Amylase is a an enzyme that digests
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IB KYAW WAI IB1I KYAW WAI IB1I CHEMISTRY IA (2) TITRATION OF ACID & ALKALI Name: KYAW WAI Date: 5th February 2013 IA CRITERIA ASSESSED: DCP‚ MS Declaration I declare that this report I have submitted is my own original work and I have acknowledged the use of words or ideas of another person. Signature: ______________________________ Marks: ______________________________ Aim of the experiment: The aim is to determine the water of crystallization of a diprotic acid by
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