Heidi Duncan 11/24/13 Exothermic and Endothermic Reactions Lab The purpose of this lab is to observe how heat is released or absorbed with different chemicals. Data Table 1 – HCI and NaOH Trial 1 Trial 2 Avg Volume 1.0 M HCI(ml) 25 25 - Volume1.0 M NaOH (ml) 25 25 - Ti of HCI before mixing 20 20 - Ti of NaOH before mixing( 20 20 - Average Ti before mixing( 20 20 - Tf of mixture ) 26 26 - T ) 6 6 - Specific Heat (J/g) 4.184 4.184 - Heat‚ q (J) 1255.2
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Background: This lab is all about finding the density of a candy bar‚ and determining whether or not the candy bar will float or end up sinking in a glass of water. In order to investigate the principles of mass‚ you have to find the volume and density for four different types of candy bars. My question is‚ which candy bar will have the least amount of density? Hypothesis: If a Twix has cookie inside‚ then it will have the least amount of density. Materials: 4 candy bars( Snickers‚ Twix‚ 3
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are the density‚ relative error and the standard deviation. Density is refers to the mass (m) per unit volume (V) of a material and is often represented by the symbols d or ρ‚ where d = m/V. The density of an object changes with pressure and temperature. Second‚ relative error is a calculated by finding the difference between the true and measured values and dividing this difference by the true answer. And‚ the standard deviation is the measure of the spread of dispersion of scores (density) from the
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1.2. Laboratory vs. Kitchen. 1.3. Safety in lab and in the kitchen. 1.4. Cutting onions or a scientific investigation. 3 Unit 2. How do we measure in the kitchen? 2.1. How do we measure the quantity of each ingredient in our cooking? 2.2. An Old Scottish Recipe or how to convert units. 2.3. Does one kilo of sugar weight the same as one of rice? or an introduction to the density. 2.4. Fresh or old eggs or the relation between density and floatability. 15 Unit 3. Let’s go to
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obtaining an average density & boiling point for my liquid and comparing them with the known densities & boiling points of liquids in the CRC handbook of Chemistry & Physics. I will perform these experiments using three different measuring tools (graduated cylinder‚ burette & pipette) to evaluate the precision of each one. Results: Density 1‚ 2 & 3 calculated by using graduated cylinder to obtain volume. Density 4‚ 5 & 6 calculated by using volumetric pipette to obtain volume. Density 7‚ 8 & 9 calculated
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DENSITY DETERMINATION An old riddle asks “Which is heavier‚ a pound of feathers or a pound of lead?” The answer is obvious‚ of course‚ since a pound of feathers and a pound of lead both weigh the same‚ one pound. However‚ there is clearly something different about a small piece of lead and a large bag of feathers‚ even though they weigh the same. What is this difference? The relationship between the lead and feathers is expressed by the physical property called density. Density is defined
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Density is how compact particles are inside an object. Objects can be different sizes but have the same density because the density depends on how close particles are together‚ not the size of an object. The density of water is 1 g/㎤. Any object with a density less than that will float. Any object with density more than that will sink. Carbon dioxide‚ or CO2‚ also played a big role in this experiment. Many soft drinks contain CO2. Studies show that Sierra Mist had the most carbonation out of
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8/11/14 The purpose of this lab is to calculate the density of aluminum with different masses and volumes of aluminum bits and water. Aluminum Bits balance graduated cylinder water cupcake liners paper towels 1. First‚ get materials ready for the experiment by cleaning and/or drying materials 2. Mass the cupcake liner 3. Add water to the graduated cylinder and record the volume of water added. 4. Place some aluminum pebbles into the cupcake liner and place it on the balance. Record
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Density Name : Prashanth Ashok Date:22/2/2012 Partner’s Name : Marcus Lee Lab Section : 6 Results and Discussion Part A | |Measured Weight (g) |Weight of water (g) |Density of water | |Graduated Cylinder |62.33 |-- |-- | |Graduated Cylinder + 10ml water |72.04 |72.04 - 62.33 = 9
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General Chemistry 1 Lab 1: Laboratory Techniques and Measurements Purpose: The purpose of this lab is to ensure that students are able to understand how to conduct measurements of length‚ mass‚ temperature‚ density and volume using different measuring devices. Students will also learn how to dilute substances by using simple algebra. Procedure: 1. Prepare a data table similar to Data Table 1 shown below. 2. Choose any three objects that are shorter than the metric ruler to measure‚ such
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