Experiment Essay Examples

Determining the empirical formula of magnesium oxide lab

Since multiplying the ratio by five gives the closest values to whole numbers, therefore the empirical formula of the oxide is Mg6O5. The third trial was not taken into account because the mass after combustion was not recorded. Uncertainty calculations: The uncertainties for masses in both tables will be: 0.01+0.01=0.02g Table one: Here are the… View Article

A Balanced Chemical Equation by Experiment

Introduction The purpose is to use the mole relationships to prove the validity of the balanced chemical equation and that the final product of the experiment would confirm the balanced equation. The hypothesis made is that the experiment would in fact confirm the balanced equation. This is because, by balancing the equation two products that… View Article

Preparing Salts- IB Lab

Calcium chloride (CaCl2) has been manufactured for over 100 years. The salt is used in a variety of industrial and consumer products, and is supplied as flakes, pebbles, pellets, powders and solutions with varying concentrations. Calcium chloride dissociates easily in water to form Ca and Cl ions. Calcium is essential for the formation of skeletons,… View Article

Determination of the molar volume of hydrogen gas

Introduction We are going to determine the molar volume of hydrogen gas by letting known amount of magnesium react with dilute hydrochloric acid and carefully collecting the gas formed. Materials Gas syringe Hydrochloric acid, 2-molar 8 cm of magnesium ribbon Ruler Emery cloth For details see instruction form Methods We connect the equipment according to… View Article

Investigation on finding the Molar Mass of Butane

Aim: To find the molar mass of butane, by finding the number of moles of gas in the container and comparing it to the mass of butane in the container Theory Butane (C4H10), also called n-butane, is the unbranched alkane with four carbon atoms, CH3CH2CH2CH3. Its only other isomer is methylpropane: CH(CH3)3. It is an… View Article

Properties of Hydrocarbons

Aim: To demonstrate that different classes of organic molecules undergo different characteristic reactions. Data Collection: Cyclohexane Toluene Cyclohexene Combustion – no sootiness – calm, bright flame – short burn – a lot of sootiness – strong, bright flame – long burn – medium sootiness – bright flame – short burn Solubility in distilled water –… View Article

Determining the Formula of an Unknown Hydrate

The final equations that was concluded after the experiment and the calculations are CuSO4 � 5H2O and MgSO4 � 5H2O. There are 5 water molecules per Copper (II) Sulphate and 7 water molecules per Magnesium Sulphate. The compounds are all hydrates which is a substance that contains water. This occurs when crystals form from the… View Article

Kinetics Lab

How does the molar concentration of hydrochloric acid affect the rate of pressure in a gas releasing reaction? The aim of this experiment is to record how the change in molar concentration of hydrochloric acid affects the rate of the reaction. The following reaction will be tested: Na2CO3 10H2O + 2HCl –> 2NaCl + CO2… View Article

Determining the position of unknown element X in the Reactivity Series

To determine the position of Element X in the reactivity series Hypothesis The reactivity series is the arrangement of elements according to their reactivity. The most reactive element is placed at the top and the least reactive at the bottom. The elements at the top can displace elements below them from their compounds In the… View Article

Indirect thermometric Titration

* School Name: Al Mashrek International School * School Code: 2108 * Subject: Chemistry * Topic: Indirect A thermometric Titration. * Assessment: Data Collection, Data Processing & Presenting, Conclusion & Evaluation. * Candidate Name: Bassam Al-Nawaiseh * Date: 20/5/2007 * Aim: The aim of this experiment is to determine the concentrations of two acids. The… View Article

Analysis of Silver in an Alloy

The purpose of this lab was to calculate the percent of silver in an alloy using gravimetric analysis. Through the procedure mentioned in this report, the percent of silver in an alloy of a U.S. Mint dime made before 1965 was 90.2% � 0.05%. Introduction: The alloy used for this experiment was a U.S. Mint… View Article

Energetics Design Lab

Research Question: How does the strength of the acid, affect the change in temperature of a reaction with sodium carbonate (acid-base reaction)? Hypothesis: I believe that if acid is stronger, than the change in temperature of the acid-base reaction will be greater. Variables: Type of Variable Variable Range of Values/Method of Control Independent Variable Strength… View Article

Electrochemical Cell

Introduction To investigate the effect of change in temperature of the solutions on the voltage of an electrochemical cell. How does increase in temperature of the electrolytes in en electrochemical cell affect the voltage? An electrochemical cell produces electrical energy from chemical energy, where the chemical energy comes from the reactions in the cell. An… View Article

Chemistry Extended Essay

To investigate the effect of 2-bromo-2-methyl propane concentration and temperature of the system on the rate of reaction of solvolysis of 2-bromo-2-methyl propane in 90% ethyl alcohol Done by: Habib Iscandar Hinn Friend’s Boy’s School June 22, 2007 To investigate the effect of 2-bromo-2-methyl propane concentration and temperature of the system on the rate of… View Article

Paper chromatography

Aim : to separate and identify of the pigments in leaves by paper chromatography Principle of design: In this experiment, a strip of filter paper containing a small spot of concentrated chlorophyll pigment is dipped in a mixture of developing solvent, the pigments was carried up the strip as the solvents move up. Since the… View Article