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

Percentage of Water In Popcorn

Extracts from this document...

Introduction

Lab 2: Percentage of Water in Popcorn The purpose of this lab was to find the percentage of water in each sample of popcorn in order to determine which brand of kernels: beta, gamma, or delta, all with different amounts of water, produced the best-popping popcorn. The amount of water in the popcorn affects the quality of the popcorn. When the water inside the kernel is heated above 100�C, the water turns into gas which causes the pressure inside the kernel to increase. The pressure of the gas expands the kernel, which causes it to pop. Quality was judged on the basis of the rate of the pops, the size of the popcorn, and how easily the popcorn burned. Each technique of popcorn was divided up into three piles in order to conduct three trials on each technique. A group of kernels was massed and then placed into a beaker, which was also massed. Then just enough oil was poured into the beaker to cover the bottom of the beaker with a thin film of oil. A piece of foil with tiny holes was placed over the beaker, and the beaker with the foil, oil, and kernels was massed. The kernels in the beaker were heated using a Bunsen burner. ...read more.

Middle

When compared to the class average, the average of my data was rather accurate. To find the percent error, this formula was used: Percent Error = ? theoretical value - actual value ? � 100 Theoretical value My percent error for beta, gamma, and delta kernels was 0.90%, 4.46%, and 13.5% respectively. (See calculations in appendix) See Table 2 - Percent Error This percent error could have occurred while massing. Since there were several balanced used instead of just one, the masses could have differed. One balance was used for the kernels, while the beaker mass was found using a separate balance. The different balances could have lowered the accuracy of the masses. Another place where mass could have been inaccurate was when the popcorn was popped. Sometimes the popcorn was burned, while other times the popcorn was popped perfectly. If the popcorn was burnt, the mass was lowered by the release of CO2. Also, the duration of the heating of the popcorn was inconsistent. Since the popcorn of the same technique would still pop at different rates, it is impossible to control the time of the heating. But the longer the beaker is heated, the longer the oil inside is also heated and evaporating. ...read more.

Conclusion

109.398 g 113.031 g 112.493 g Quickly and easily popped, produces largest popcorn Delta 3.781 g 110.001 g 113.782 g 113.062 g Produces the medium-sized popcorn Calculations: mass of unpopped popcorn - mass of popped popcorn �100 = % of water in unpopped popcorn mass of unpopped popcorn Trial 1: Beta: % water = 118.002g - 117.626g � 100 = 11.1% 3.383g Gamma: % water = 112.277g - 111.690g � 100 = 16.7% 3.506g Delta: % water = 115.003g - 114.188g � 100 = 19.4% 4.210g Trial 2: Beta: % water = 114.276g - 113.897g � 100 = 11.3% 3.354g Gamma: % water = 98.892g - 98.319g � 100 = 15.7% 3.661g Delta: % water = 108.995g - 108.312g � 100 = 17.0% 4.018g Trial 3: Beta: % water = 118.417g - 118.050g � 100 = 10.9% 3.364g Gamma: % water = 113.031g - 112.493g � 100 = 14.8% 3.633g Delta: % water = 113.782g - 113.062g � 100 = 19.0% 3.781g Percent Error = ? theoretical value - actual value ? � 100 Theoretical value Beta: Gamma: ?11.1% - 11.0% ? � 100 = 0.900% ?15.7% - 15.0% ? � 100 = 4.46% 11.1%% 15.7% Delta: ?18.5% - 21.0% ? = 13.5% 18.5% ?? ?? ?? ?? Appendix 5 Appendix ...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. How duration affects the rate of electrolysis in a Voltaic Cell

    Nevertheless, the electrode potential cannot be determined. Conclusion My results show that as the duration/ time intervals increase, the mass of the anode (zinc electrode) decreases and the mass of the cathode (copper electrode) increases. We can see that there is a strong positive correlation between the time it takes for both electrodes to change in masses.

  2. Dissolved Oxygen in water

    * A dissolved oxygen test kit. * Clipboard, paper and pen to write down your results. Method of experiment: 1. Go to the sewage plant, and from each tank take a water sample. 2. To take the water samples, place your hand in the water and wait until the bottle fills up.

  1. The Drop of Water

    4.0 Data processing and Presentation 1. Combined weight of drops and beaker (g) 27.74g - Weight of beaker (g) - 27.20g ---------------------------------------------------- ----------- Weight of drops (g) 0.54g 2. Weight of drops (g)

  2. Crude Oil

    Geologists are the ones responsible for finding the world's large quantities of Crude Oil. There job is simply to find the right conditions for an oil trap, the right source rock, reservoir rock and entrapment. There are a couple of ways to do this, including the use of the Earth's

  1. FInding the percentage purity of CACO3 in egg shell

    Add two drops of phenolphthalein into the solution 28. Hold the tap with your left hand and the conical flask with your 29. Slowly open the tap of the burette and let the alkali flow into the conical flask.

  2. The chemistry of atmospheric and water pollution.

    + O3 (g) ï ClO. (g) + O2 (g) Then this chlorine oxide radical reacts with an oxygen free radical (oxygen atom) to form a chlorine free radical and an oxygen molecule: ClO. (g) + O. (g) ï Cl .(g) + O2 (g) Overall reaction: O3 (g) + O. (g)

  1. Measuring the fatty acid percentage of the reused sunflower oil after numerous times of ...

    As a result trans- unsaturated oils have high melting points. And the higher melting point increases the number of frying that can be made by using trans-oils. So it can be seen that another property apart from taste and cheapness is being reusable.

  2. Testing the Suitability of Pool Water. The expected amount of chlorine which is ...

    Solid potassium Iodide - KI * Concentration of 0.025 mol dm-3 of sodium thiosulphate (Na2S2O3) * Aqueous silver nitrate (AgNO3) * Universal indicator solution and colour chart Method: 1) First we divided ourselves into groups of about three. Then we made a solution of sodium thiosulphate of 0.025 mol dm-3.

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