• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Densities of liquids

Extracts from this document...

Introduction

Densities of liquids Concepts 1. Density is a physical property of materials 2. Equal volumes of different things usually have different weights 3. Heating and cooling cause changes in properties 4. Principle of Archimedes Chemical properties cannot be quantified: they are described by chemical reactions in which the substance participates. Physical properties can be expressed quantitatively measured by mathematical formulas derived from the basic units of measurement: Length, time, mass and charge. Density is one such physical property of substances that scientists use on a regular basis. For synthetic organic chemists two uses are important. First it is often more convenient and safe to measure a liquid by volume than by weight. In order to know the weight and therefore the number of molecules, the density of the substance must be known. Second when mixing water and a water insoluble liquid it is important to know which liquid phase will float on the top of the mixture and which liquid will sink to the bottom. In this experiment we will measure the density of some liquids and explore some variables. ...read more.

Middle

Volume of the density bottles could vary as each density bottle is an individual and could have slight variation. Different sizes of Glass stoppers and density bottles meaning could cause a variable in my results. The density bottles not being cleaned out properly and still having residue from the last liquid which could cause inaccurate results Formulas used to help me find the density of the liquids used. Density = mass volume to find the volume I rearranged this equation to find the volume Volume = Mass Density Relative Density = mass of substance (liquid used) mass of mass of distilled water Actual density of substance = relative density of substance x density of water at 23?c Compare masses of substance mass of water = relative density Safety precautions of experiment * Not using the same pipette so you do not contaminate liquid * Do not hold bottle by bottom only hold by the neck risk assessment for using chemicals * Wearing goggles * Hair tied up * Wearing gloves to prevent irritation * Use tissue to wipe of chemical off bottle * wipe table down as filled density bottle could over flow Calibration No of density Bottle Mass of density bottle empty(g) ...read more.

Conclusion

Empty = 21.79g mass of relevant density bottle and distilled water = 45.97 g no of density bottle (297) mass of empty density bottle (141) = 19.96 g mass of empty density bottle (141) and alcohol = 39.86 g Mass of empty density bottle (127) = 19.46 g Mass of empty density bottle (127) and acetone (propanone) = 39.24 g Mass of empty density bottle (17) = 22.10 g mass of empty density bottle (17) and propan-1-ol = 42.35 g Mass of empty density bottle ( 124) = 20.26 g Mass of empty density bottle (124) and propan-2-ol = 40.64 g Mass of empty density bottle (45) = 20.08 g Mass of empty density bottle (45) and ethane 1,2 diol = 48.30 g mass of density bottle (102) = 20.37 g mass of empty density bottle (102) and glycerol = 52.43 No of density bottle mass of density bottle empty mass of empty density bottle +chemical chemical used in the density bottle Density of chemical at 23?c volume 12 22.10 42.35 propan-1-ol 127 19.46 39.84 acetone 141 19.96 39.86 alcohol 124 20.26 40.64 propan-2-ol 45 20.08 48.30 ethane 1,2 diol 102 20.37 52.43 glycerol 297 21.29 45.97 distilled water Alison Braybrook Page 7 4/5/2005 7 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Classifying Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Classifying Materials essays

  1. Our experiment consisted of two samples of water containing unknown substances, and our objective ...

    However, there must've been a major flaw in our attempts to conduct a fair test. This is because the mass of the sample of water (20cm3) was 19.8g; and after heating the results indicated that there was no solid left over and the water had all evaporated.

  2. Whats in the bottle?

    Method and Results; Negative ion Method Observations Carbonate (CO32-) Add dilute acid to solid Effervescence and bubbles then goes a little bit cloudy. Chloride (Cl-) Acidify solution with dilute nitric acid then add silver nitrate Gradually goes little cloudy. Bromide (Br-) Acidify solution with dilute nitric acid then add silver nitrate Turned into whit cream precipitate.

  1. The aim of the experiment is to identify 6 unknown colourless liquids by carrying ...

    Next, acidify the solution with 1cm3 of nitric acid and then add 1cm3 of silver nitrate solution. As a result, a pale cream precipitate of silver bromide will be formed. (1) Equation for the reaction: AgNO3 + HNO3 C2H5Br C2H5OH + AgBr Bromoethane Ethanoic Acid Silver Bromide Alcohols: Both 2-Methylpropan-2-ol and Butan-1-ol are alcohols.

  2. chemistry open book:formation of natural and synthetic rubber

    Vulcanisation produces a rigid rubber. The process heats rubber with sulphur and the sulphur molecules cross-link the polymers chains together. # Figure 9 Shows how the where the sulphur molecules cross-link Figure 10 This diagram explains how the polymers become rigid Covalent bonds increase strength between chains, but also the sulphur atoms help increase the

  1. The role of mass customization and postponement in global logistics

    within constraints set by the manufacturer. * Best (Matched) Fit: The feet of each individual customer are examined (by the means of a foot scan or in combination with biomechanical data) and used to match the customer's feet to an existing library of lasts, insoles and soles with a much higher granularity than in today's mass production and retail systems.

  2. What "Carried the Trick"? Mass exploitation and the decline of thought in Ray Bradbury's ...

    Commenting on the text, Bradbury claims that "Fire-Captain Beatty . . . describe[s] how the books were burned first by minorities, each ripping a page or a paragraph from this book, then that, until the day came when the books were empty and the minds shut and the libraries closed forever" (177).

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work