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

Investigate the effect of one factor on the boiling temperature of a liquid

Extracts from this document...


Investigate the effect of one factor on the boiling temperature of a liquid Background Information Salt (NaCl) is a substance with a low vapour pressure. In comparison to any type of liquid, salt still has a lower vapour pressure. If salt was to be dissolved in water (H2O), in this case for the experiment, then consequently the salt will cause the overall vapour pressure of the solution to decrease and have a lower vapour pressure. Lowering a solution's vapour pressure means that the solution will have a higher molecule vaporising point then pure water (without added salt). In other words, the boiling point of the solution will increase and therefore have a higher boiling point temperature. A term used to describe this outcome is also known as boiling-point elevation. [1] In this experiment the affect of table salt on the boiling point of tap water will be measured. Pure tap water without table salt added will be the control of this experiment and all results will be compared to the results of the pure tap water. ...read more.


undisturbed on blue flame to reach its optimum temperature When the Bunsen burner safe flame is changed to blue flame, the Bunsen burner will be left on the bench undisturbed for 2 minutes The repetition and speed of stirring the solution When the beaker is placed onto the tripod with the blue flame on, immediately 5 slow circle rotations of the stirring rod will be performed to dissolve the salt into the water The amount of water used for this experiment For this experiment, 500 millimetres of water will be measured in the beakers. When measuring the water level, the observer must get down to eye level to avoid parallax error and misreading of the water level Avoiding contaminations to the equipment used in this experiment Before using equipments, distilled water will be used to thoroughly clean all equipments to avoid contamination and residues The brand and type of table salt used for this experiment Woolworths Iodated Table Salt will be used for this experiment The accuracy of measuring small amount of salt The sampler spoon will be filled with salt right to the top, (touching the edges but not overflowing) ...read more.


The Bunsen burner was set up and the safe flame was left on. The tripod was placed directly above the flame 7. When the Bunsen burner was changed to the blue flame, the stopwatch was used to record 2 minutes of the flame left undisturbed 8. The beaker that read Control was immediately placed onto the tripod after two minutes was up 9. The stirring rod was instantly retrieved and 5 slow circle rotations were performed to dissolve the salt into the water 10. The beaker was left stable on the tripod. Whilst waiting for the water to boil, changes to the solution was carefully observed. Observations were recorded as qualitative data. When the whole surface of the water boiled, the tip of the thermometer was immediately placed at the centre of the beaker for 30 seconds. The degree of the water was then recorded. 11. In avoiding dangers, the blue flame was changed to the safe 12. The beaker tongs was used to remove the beaker from the tripod and the beaker was then placed away from the experiment area 13. The wash bottle was used to clean residues off the thermometer. 14. Steps 7-12 was then repeated for the rest of the beakers labelled; 10g; 20g; 30g; 40g; 50g 15. ...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. A comparison of various proprieary antacids

    I would therefore like to reject my hypothesis because as clearly seen from the results, the Actal Tums were almost 16 times more effective than the Zolicid gel, and the Eno tablets were about 3 times more effective in terms of the number of moles of hydrochloric acid neutralised, in comparison to the Zolicid Gel.

  2. Research question - How many molecules are there in a liquid drop?

    collected as we took five different trials (20, 40, 60, 80 and 100 drops) for each of the four liquids, just to average it down and get the mass of one drop (for each liquid). Furthermore, we measured the masses of high numbers of drops ex:- 60, 80, 100 drops etc.

  1. Investigating the effect of different liquid densities on the time taken to release ...

    Then change ethanol with methanol, propan-1-ol, butan-1-ol and octan-1-ol. Experiment step 1 - 9 with each alcohol. * Range and repetitions of experiment: * There are 5 different ranges (The lowest value: 0.789 g ml-1 & the highest value: 0.826 g ml-1, Please refer to Data Collection and Processing -> Processed data).

  2. Chemistry Internal Assesment - Stoichiometry (measuring 'x' in salt)

    water 1,5 / 18 = 0,0833 4) calculating ratio c) salt 0,0142 / 0,0142 = 1,0000 d) water 0,0833/ 0,0142 = 5,8661� 6 The ratio, in that case, is 1:6. That attempt is much more precise. RESULT Although I made two experiments, with using different masses only, I will notice

  1. IB Chemistry Lab Design - compare the effect of temperature on the concentrations of ...

    pH changes it will interfere with the results, potentially giving inaccurate results. Thus, the pH needs to be kept a constant. This can be done by adding a few drops of acidic buffer to the initial solution. Presence of Antioxidants Antioxidants including salts such as sodium chloride tend to ?protect?

  2. The chemistry of atmospheric and water pollution.

    This ozone depletion is due to complex air motions. Air enters the stratosphere near the equator, where solar heating is highest. Then the air moves slowly towards both poles where it sinks. Over Antarctica, cloud ice particles exist that are not present at warmer latitudes.

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