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

liquids polarity

Extracts from this document...


LIQUIDS DEFLECTION /cm STRUCTURE Explanation Heptane 0.5-1 -Non polar -tetrahedral -It has an elctronegativity of 0.3, so it becomes covalent non-polar. Deflection is too small, and no attraction towards charged ruler is seen. Ethanol 2-3 -Polar -Tetrahedral -Oxygen with its two lone pairs becomes the negative charge as electronegativity is the biggest; while hydrogen and carbon atoms become positive, having two different charges giving polarity and dipole moments. This molecule as others, as Propanol, Ethane -1,2-diol and Ethanoic acid have Oh bonding and will have a high boiling points. Propanol 1-2.5 -Polar -Tetrahedral -Because of the two lone pairs of oxygen, and its high electronegativity between hydrogen and carbon atoms, attraction will be lead to him and become negatively charged, while hydrogen with the lower electronegativity will lose electrons easier and become positively charged; having a polarity in charges. However charges are balanced with the big positive charge, having a polar stream but no to strong to deflect it enough as shown. Propanone 2-3 -Polar -Tetrahedral -The electrons in both bonds are strongly attracted to the more electronegative oxygen atom than the less electronegative carbon. ...read more.


Hand C atoms bonded with O will exert a force towards him, and b cause of its lower electronegativity a positive charge, leading to a giant polarity in the molecule. Distilled water 3-4 -Polar -Linear bent -The stream had almost a big deflection caused by the only most electronegative O atom, with two pair of lone pairs, having a big negative centre, while it is shared two H, which are less electronegative and have positive charges, forming a big polarity shown on the deflection. Approximate decreasing polarity of liquids: � Ethanoic acid � Ethane-1,2-diol � Distilled water � Propanone � Ethanol � Ethyl acetate � Propanol � Heptane Evaluation Limitations Improvements � Deflection � Students were observing the stream or jet deflection as it was falling instead of the displacement that the stream made over the liquid, as it fell which was easier to observe and analyze the respective deflection. � While observing the deflection over the liquid in the beaker, it still ended hard to see the deflection as the liquid made a displacement over it; for a exact results we shall put some scale (cm) ...read more.


to cancel each other. In the other hand, when compounds are polar is in cause of the unequal sharing because elements have greater electron affinity/ electro negativity than others gain attraction between their bonds and electrons. In this experiment we see how the rest of the liquids contain Oxygen atoms, mostly with its lone pairs, and high elecrtonegatiity, which made the atoms slightly negative charged; even as, Hydrogen and Carbon atoms with lower electronegativity than O creating a positive charge. So, when the ruler with the negative charge was getting closer into the jet of each liquid, they changed position and exerted a turning effect, so that the negative charges (oxygen in compounds, and rubbing ruler/rod) wouldn't repel with each other and therefore the positive charges lined up and create an effect of attraction with the negative charge of ruler, called a dipole moment. The polarity ranking of functional groups says that acids are the second ones most polar after amides , which explains that these compounds places this polarity because of H bonding and the presence of two O atoms. So it explains the rank of Ethanoic acid as the most polar of all. ?? ?? ?? ?? Testing liquids for polarity ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate 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 International Baccalaureate Chemistry essays

  1. Properties of Hydrocarbons

    The results achieved above show that saturated and unsaturated hydrocarbons have a large difference in their properties, even if they originate from the same skeleton. For example, cyclohexane and cyclohexene both originate from six carbon atoms but the added double bond in the cyclohexene differ the properties between the two significantly.

  2. testing liquis for polarity

    However, this negativity is balanced thanks to the C and H atoms in the left. This is way this molecule is polar but not enough to deflect the stream so much. This is why it shows a medium deflection of 3 cms.

  1. Dissolved Oxygen in water

    (Be very careful with the glass bottle as it is very weak and can shatter easily.) 7. Step 3: Add some more sample to fill the bottle completely. Carefully stopper the bottle again and ensure that a part of the sample spills over.

  2. Kinetics of the Acid-Catalyzed Iodination of Propanone

    1.0 + 1.1% 21.05 26.37 22.32 26.25 22.00 1.0 + 1.1% 14.80 15.61 14.00 19.16 15.74 In was assumed that he percentage uncertainty of the stock solutions provided would be that of 1%. As the burette had an absolute uncertainty of 0.005 mL, it was assumed that in taking two

  1. Chemistry extended essay - investigate the effect of 2-bromo-2-methyl propane concentration and temperature of ...

    and put it in an Erlenmeyer flask and label it #2. 3- Using a burette take 30 ml of the solution in Erlenmeyer flask #1 and put it in another Erlenmeyer flask and label it #3. 4- By a graduated pipette take 3 ml of sodium hydroxide 0.1 M in an Erlenmeyer flask and label it #4.

  2. The Polarity of a Compound. We also determined that Water (H2O), is the most ...

    Cyclohexane C6H12) we clearly see that it is identically symmetrical on both sides and thus does not have a + or - pole. Adding, non-polar molecules poles never attract, and so when the liquid from the pipette streamed down it should have hypotheticcly been unaffected by the rod`s polarity.

  1. Practical de quimica Structure and Bonding

    Substance Observations Calcium Chloride It did not melt totally but the white powder became brown and it was stuck to the test tube. Graphite No visible change was seen with the high temperature. Iodine It dissolved and evaporated very quickly, the grey powder became purple and a few of substance was left on the walls of the test tube.

  2. Factors Affecting Angle of Deflection

    Therefore the deflection when the rod is 4cm from the flow will be one quarter of that if the rod is only 2cm away. Dependant, Independent and Controlled Variables: The experiment contains elements of all three variables like all other experiments.

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