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

The effect of different factors on egg white.

Extracts from this document...


Biology Coursework By: Abdulla Mohammed Allam 'A'levels Planning Section Title of the coursework: the effect of different factors on egg white (albumen) As the title suggests I am going to investigate the effect of various factors in egg white. And as all of us know that egg meals are rich in proteins and that why we feed them to small children. But not all the parts of the egg have the same amount of proteins in them and as we know that there is the yellow part which has fairly less amount of protein compared to the white part and that is why I chose the white part to test the effect various external factors on the protein which it contains and it is called albumen. And to understand what I am going to do in my coursework I am going first to give a small explanation on the nature of the proteins and their structure in general and albumen in special. Proteins are in general made of small particles called amino acids. And this is achieved by when many amino acids combine together to form polypeptides in a condensation reaction. ...read more.


This was for the physical factor, for the chemicals I decided to observe the effect o f acids, alkalis and heavy metals and for the acids I decided to use hydrochloric acid (HCl) and for the alkali I decided to use sodium hydroxide (NaOH) and for the heavy metals I decided to use either mercury chloride or silver chloride depending on the availability. And for each chemical I decided to use three different concentrations for each and they are going to be .0.25M, 0.5M, 0.75M and 1M for the acid, alkali and the heavy metal. To carry out the experiment I got to use some materials and apparatus and below is a list of them followed by the use of each in brief: * Beakers * Test tubes * Measuring cylinders (10 cm�, 5 cm�) * Dropper * Test tube holders * Lab stickers * Glass rod * Freezer * Eggs * Hydrochloric acid * Sodium hydroxide * Silver chloride Each of the materials and apparatus above has specific uses as shown below: Beakers: are going to hold the whole amount of the egg white and acids, alkalis and the heavy metals. ...read more.


Factors to be controlled: For a fair test to be carried there are various factors to be controlled to ensure that fair test to be carried and below are the list of factors that should be controlled: * Maintaining a constant temperature: to make sure that the experiment goes smoothly one should maintain a constant temperature preferably a room temperature and that is because it the temperature was raised the rate of reaction will change. * To leave all the test tubes for the same time so as none of them will have an advantage on the other. * Same amount of egg white to be used in all as the same amount of acid, alkali and heavy metal to be same through out the whole experiment. * To ensure accuracy one should repeat each experiment at least twice and take the mean of the values recorded. * I will try to make the reaction go by itself and prevent shaking any of the test tubes to give a fair chance to all the other test tubes. After carrying on the experiment I am going to record my results in a table, which is shown on the next page: ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Physical 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 AS and A Level Physical Chemistry essays

  1. Marked by a teacher

    Experiment investigating hydrogen bonding in different chemicals.

    5 star(s)

    Answer to Study Questions What (theoretical) assumption(s) is/are taken in estimating the strength of hydrogen bond in the two cases? Hydrogen bond is defined as the intermolecular force formed between H atom attached to F, O, or N and the lone pair electrons on F, O or N.

  2. Identification of amino acids by using paper chromatography

    can see for my result Aspartic Acid - alone was 1.44 this due to poor solubility this also suggest it is less polar Evaluation As I was carry out my experiment ii found out that certain things which thought would be easy to do was not for example the ninhydrin

  1. Investigating how concentration affects rate of reaction

    Numbness. Convulsion. Collapse. Coma. Death. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. To remove substance use polyethylene glycol 300 or vegetable oil. Refer for medical attention. Wear protective gloves when administering first aid. Contact with eyes Pain. Redness. Permanent loss of vision.

  2. Chemistry planning exercise

    Repeat steps 5-7 at least twice more. 9. Empty the burette and wash it carefully after the titration, especially if it has a ground glass tap. Accuracy Burette readings should be recorded to the nearest 0.05 cm3 (approximately one drop).

  1. Identification of amino acids by chromatography.

    of 5cms, so I must conclude that my experiment was imperfect and partially inaccurate. The absence of distinct marks from 4.35cms to 5.85cms means that any Rf values from: 4.35 = 0.26(2d.p.)

  2. Chemistry Coursework: Investigating the effect of Concentration on the Rate of Reaction


  1. Outline and examine some uses of different metals through history, including contemporary uses, as ...

    Zinc: zinc?s reactivity is used to protect iron and steel 3. Aluminium: corrosion resistance due to rapid reaction of aluminum and oxygen which forms a surface passivating layer, used for house gutter 4. Copper: copper?s low reactivity with oxygen and water make it useful for water pipes Note- a passivating

  2. Activity Series of Metals Lab

    + CoCl2 (aq) --> Co (s) + MgCl2 (aq) 5 Zinc Calcium Nitrate non- reaction Zn (s) + Ca (NO3)2 (aq) --> NR 6 Aluminum Tin (II) Chloride reaction 2Al(s) +3 SnCl2(aq) -> 3Sn(s) +2AlCl3(aq) 7 Copper Silver Nitrate reaction Cu(s)+ AgNo3(aq)-> Ag(s) +CuNo3(aq) 8 Tin Lead (II)

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