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

Benzoic acid lab report

Extracts from this document...

Introduction

Result Compound Mass of a crude solid, g Mass of a recrystallized solid, g % Yield (For recryst-n step) Measured melting point, ? Reference melting point, ? Benzoic acid 1.1 .56 55% 120-128 122.4 Benzil 1.29 .56 43% 96-98 94.4 Mixture N/A N/A N/A 80-113 114 Table 1 The crude benzoic acid was a white powdery substance that weighed 1.1 grams. The pure benzoic acid that was recrystallized was white crystals weighing .56 grams. While the solution was cooling small crystals began to form in the solution. It was then vacuum filtered and white crystals were left in the filter and were weighed. % Yield= (Final mass/Initial mass) X 100% % Yield (Benzoic acid) ...read more.

Middle

It was no longer conglomerate of both. Table 1 shows the percent recoveries of both substances were low and this could have resulted from the all sorts of possible mistakes during the lab. The melting point for benzoic acid matched the melting point for pure benzoic acid. The expected melting points for benzoic acid is 122.4?, experimental melting point was 120-128?. The expected melting points for benzil is 94.4?, but the experimental melting point was found to be 96-98?. The higher melting point indicates that the crystals formed were not pure. Likewise, the melting point of mixture was found to be 80-113?, which is slightly lower than the expected melting point. I compared my IR spectrum to the spectrum on the Japanese National Institute of Materials and Chemical research. ...read more.

Conclusion

Extraction is an important part of organic chemistry. It is used in many fields to trait soil, fuels, and metals. Extraction is a basic procedure in organic chemistry that is necessary to learn and understand. This lab taught many basic aspects of organic chemistry. It included the chemistry of acids and bases, new lab techniques. Conclusion The results for the experiment showed that compounds were separated from the mixture (in low yield), but both benzil and benzoic acid were not completely separated from the mixture. While this experiment did not give pure products or good yields, if carried out more carefully, extraction can be a useful way to separate a mixture into individual compounds. ?? ?? ?? ?? ...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 Organic Chemistry 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 Organic Chemistry essays

  1. Free essay

    Chemistry - Reactivity Serires report

    4 star(s)

    metal and the metal solution are the same, but when the ribbon is put into the rest of the 4 kind of solution, it would be reacting with them and replaced the metal in the solution. So I could proved that magnesium have the highest reactivity out of all.

  2. Peer reviewed

    Growing Alum Crystals

    4 star(s)

    A saturated solution is when it reaches a point, where no more salt can be dissolved in the solvent. For example: NaCl with water: when adding it to water and stirring it, it quickly dissolves.

  1. Physics Report on a Visit to the Royal Naval Engineer College

    * Tensile strength * Yield stress * Youngs Modulus The Engine Diesel engines are used extensively in the navy, serving as propulsion units for small boats, ships and land vehicles, so it's important to know how the engine exactly works.

  2. In this report the effects of fire and explosion are examined based on quantitative ...

    and gases or vapours. Flames results from gases or vapours burning, although fires can occur on solids, without flame production. To prevent a fire form starting or progressing, one of the three components must be removed; for example, depriving the fire of oxygen by smothering the fire, or denying the fire heat by cooling.

  1. What is crude oil?

    When fossil fuels burn, oxygen is reacting with the hydrocarbon molecules to produce carbon dioxide (CO2), water (H2O), oxides of the trace elements (Nox, Sox, Vox, etc. where x is 0 or a small number) and heat. How completely the hydrocarbons burn depends upon three basic factors: * The rate at which the molecules burn.

  2. GCSE Chemistry Revision Notes - everything!

    Bromide Chloride Hydroxide Fluoride Iodide Nitrate Br- Cl- OH- F- I- NO3- 2+ Barium Calcium Copper (II) Iron (II) Lead (II) Magnesium Nickel (II) Strontium Zinc Ba 2+ Ca2+ Cu2+ Fe2+ Pb2+ Mg2+ Ni2+ Sr2+ Zn2+ 2- Carbonate Oxide Sulphate Sulphide CO32- O2- SO42- S2- 3+ Aluminium Iron (III)

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