DESIGN LAB Factors Affecting the Solubility of a Solid in a Liquid In this experiment‚ my goal is to determine the affect of temperature in the solubility of a solid in a liquid. Research Question: How does the change in the temperature affects the solubility of a solid in a liquid? Independent variables: Temperature of the Solution Dependent variables: The solubility of the solid substance Controlled Variables: * The pressure of the room. * The mass of zinc chloride
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Maggie Mitchell IB Chemistry Prd. 5 THE HALOGENS LAB Date: 9/11/13 Purpose: The purpose of this experiment was to observe and record the halogens’ (NaF‚ NaCl‚ NaBr‚ and KI) reactions with the chemicals Ca(NO3)2‚ AgNO3‚ and NH4OH and use these observations to identify an unknown halogen. Data: (see next page) TABLE 1: REACTIONS OF HALOGENS WITH CA(NO3)2‚ AGNO3‚ AND NH4OH REACTION NAF NACL NABR KI REACTION W/ CA(NO3)2 solution turns cloudy and precipitate forms clear precipitate
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IB SL Biology Study Guide Unit 5 – Ecology Emma-Louise Wich Communities and Ecosystems 5.1.1 Define species‚ habitats‚ populations‚ community‚ ecosystems and ecology. Species: a group of organisms that can interbreed and produce fertile offspring. Habitat: the environment in which a species normally lives or the location of a living organism. Population: a group of organisms of the same species who live in the same area at the same time. Community: a group of populations living and
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Rate of reaction Design Lab Background: Reaction rate is most commonly defined as the speed at which a reaction takes place. This rate can be altered by many factors such as temperature‚ pressure‚ concentration‚ volume‚ or the use of a catalyst. In order for a reaction to occur‚ the atoms must collide in the correct orientation to break the bonds and must also have more energy than the needed activation energy. If their energy is not high enough‚ the reaction will not be able to take place. By
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Introduction Enthalpy change‚ ΔH‚ is defined as the heat output of a system as it goes through a reaction under constant pressure. It is an important aspect of thermochemistry‚ which is the study of energy changes during a chemical or physical reaction . When we calculate enthalpy change‚ we always assume that the pressure is constant. We are able to calculate enthalpy change numerous ways‚ notably by the increase in heat‚ Q‚ given by an exothermic reaction or the heat absorbed by an endothermic
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TITLE: THE EFFECT OF HEATING DIFFERENT SUBSTANCES INTRODUCTION: In this exercise‚ it was required to observe carefully what happened when certain substances were heated in a burner‚ and to note the appearance of the residue after heating. AIM: To observe the effects of heating different substances. MATERIALS: Hard glass test tubes Powered samples of Lead (II) nitrate Copper (II) sulphate Ammonium chloride Zinc sulphate Basic copper (II) carbonate‚ CuCO3. Cu(OH)2
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He a lt h 0 3 2 3 Fire 0 Re a c t iv it y 2 P e rs o n a l P ro t e c t io n Material Safety Data Sheet Sulfuric acid MSDS Section 1: Chemical Product and Company Identification Product Name: Sulfuric acid Contact Information: Catalog Codes: SLS2539‚ SLS1741‚ SLS3166‚ SLS2371‚ SLS3793 CAS#: 7664-93-9 Sciencelab.com‚ Inc. 14025 Smith Rd. Houston‚ Texas 77396 RTECS: WS5600000 US Sales: 1-800-901-7247 International Sales: 1-281-441-4400 TSCA: TSCA
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INTRODUCTION: The purpose of this experiment is to measure the formation constant of the tetraamminecopper(II) ion by colorimetry. Anhydrous copper sulfate (CuSO4) is white‚ which means that it does not absorb light in the visible region of the spectrum. The hydrated copper sulfate (CuSO4 - 5H2O) is blue. The structure of the compound can be represented more accurately as Cu(H2O)4 SO4 - H2O where four water molecules are bound to the copper ion and the fifth is a water of crystallization. The
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IB CHEMISTRY Unit 6: KINETICS STANDARD LEVEL: Number Objective Rates of Reaction Define the term rate of reaction. Describe suitable experimental procedures for measuring rates of reactions. Analyze data from rate experiments. Students should be familiar with graphs of changes in concentration‚ volume and mass against time. Collision Theory Describe the kinetic theory in terms of the movement of particles whose average energy is proportional to the temperature in Kelvins. Define the term activation
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Table 1: Data Collection Table – Contains all of the primary data directly obtained from the lab. Indicator | Initial volume of NaOH in burette (ml) ±0.05 | Final Volume of NaOH in burette (ml) ±0.05 | Final – initial Burette Reading (Volume of NaOH used) (ml) ±0.1 | Qualitative Observations | Phenolphthalein | 0.00 | 0.90 | 0.9 | At first when the base was being dropped into the vinegar there wasn’t a color change‚ however when the solutions came close to full titration‚ the solution
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