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

Identifying unknown substances. The test that we did was a flame test, negative ion test and a alcohol test. We also did chromatography to find out which technician labelled the bottle.

Extracts from this document...


What's in the bottle? In the experiment we had to find out the name of the entire 3 bottle. The test that we did was a flame test, negative ion test and a alcohol test. We also did chromatography to find out which technician labelled the bottle. Chromatography Chromatography is also known as a paper chromatography. Chromatography identify which type of inks make up a dye How to carry out chromatography 1. wrap a piece of chromatography paper with a stick until the paper touches the beaker 2. Use a rule and a pencil and Draw a thick line on the paper about an inch above the water's edge. Don't use a ink pen because it will absorb the water and the ink will run on the paper 3. Tape the other end of the paper with a stick and clip it with a paper clip 4. place a dot of any colour on the line 5. Fill the cup with water. Not completely, of course, of even near complete 6. full- about half an inch of water 7. ...read more.


Acidify solution with dilute hydrochloric acid then add barium chloride solution White precipitate Hydroxide ( OH-) Add drops of full range universal indicator Dark purple solution formed Testing for alcohol Another way to find out a name of a chemical is to test if it is an alcohol. Alcohol are a group of chemical that are made of carbon, hydrogen and oxygen 1. Get a solution 2. Add a drop of sodium dichromate (VI) 3. place it in a Bunsen burner 4. If the solution turns orange to green it is an alcohol. Names No. of carbon Formula Diagram mass Methanol 1 CH3OH 32 Ethanol 2 C2H5OH 46 Propanol 3 C3H7OH 60 butanol 4 C4H9OH 74 When trying to find the mass of each chemical you need to times the mass of each elements with the number of each element there are present. C mass = 12 H mass = 1 O mass = 16 When using the mass spectroscopy to determine which alcohol is present is to use a graph that shows all the mass of the alcohol and then look at the end of the graph to find the real mass of the alcohol Result: Alcohol test: A ...read more.


We found out that it was an ethanol. Are result was pen 1 was used. Evaluation I think that my result was what i expected. Whiles doing my experiment i followed all the procedures and made sure that i did all the experiment the best of my ability, but there were somet thing that were wrong in the procedures was that whiles heating the test tube for the alcohol, it is was very hard to find the change between the colour. Also it was hard to see the colour different in the flame for example when i was testing bottle B the colour look like orange - red so i did not know the different between sodium or lithium. In the experiment i tryed to see the colour clearly and try to see what the colour represent, therefore i can see what the first part of the name of the 2 bottles. In the experiment, i would like to improve the result because parts of was difficult to see what type of chemical, metal or alcohol it is. The adjustment that i would make use more reliable equipement like a measuring cylinder to make sure that my measuring is checked and that there is no mistake and that i will get the right result at the end . ...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. Identification of an unknown compound.

    ion peak (M+), which has a mass that is equal to the Mr of the compound.

  2. Ions - a qualitative analysis on our chemicals by flame testing.

    In the case that somebody's eye/eyes came in to contact with chemicals follow through the procedures of emergency eye was immediately: * Water/eye solutions should not be directly aimed onto the eyeball, but rather, aimed at the base of the nose.

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

    Obsolescence issues aside, companies with warehouses full of ready-to-shift merchandise must ask themselves: Is this the best use of company assets? Might the money tied up in inventory-related costs be more wisely invested in R&D, plant upgrades or marketing and sales.

  2. Gold. For thousands of years, gold has been regarded as the finest and ...

    Where Mg = mass of the pure gold after the process Mm = mass of the original scraping at the start of the process One of the main advantages of this process is that it is quantitative (as opposed to qualitative)

  1. Whats in the bottle?

    Potassium No reaction occurred. Sodium No reaction occurred. Aluminium Turned into a white precipitate. Iron This liquid turned into Orange precipitate. Copper This liquid turned into Blue gelatinous precipitate. 13/03/09 Testing for negative ions: To show the presence of various negative ions. Method and Results; Negative ion Method Observations Carbonate (CO32-)

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

    + 2CO2 Yeast Glucose Ethanol Carbon Dioxide Butan-1-ol has the structure of a Primary Alcohol; Carbon1 has 2 hydrogen atoms, an OH group and one alkyl group attached to it, hence a primary alcohol. Molecular Formula: C4H9OH = CH3CH2CH2CH2OH Structural formula of Butan-1-ol: Carbon1 Hydrogen atoms OH group Alkyl group

  1. Rate of reaction of different concentrations of sodium thiosulphate.

    This can be proven by the collision theory, the higher the concentration of sodium thiosulphate the faster the reaction. This is because when the solution contains high amount of particles the greater the chances of the particles colliding against each other, depending on the force and kinetic energy the particles contain, a reaction will take place.

  2. Gravimetric analysis for Chloride Ion.

    A 0.25 gram sample of unknown 547 was weighed accurately on an analytical balance using a clean, dry weighing bottle. 2. 0.2638 grams of the unknown was transferred into a 250mL beaker and 100mL of distilled water and was added.

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