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

chemistry desgin prac

Extracts from this document...

Introduction

Chemistry Design Prac Investigate the effect of one Chemistry related factor on the deflection of the liquid flow in the presence of a charged rod. Research Question: How would the degree of deflection of a stream of water be affected by the temperature of the water? Background Information: Water molecules are polarized, this means that these molecules consist of a negatively charged side and a positively charged side. When placed near a charged object, such as a glass rod that has been rubbed repetitively, this causes the rod to become charged, meaning that if a stream of liquid water is to come close to the rod, it would become attracted to the rod because of its polarity. Whether the rod is positively or negatively charged does not affect the direction of the deflection of the stream of liquid water because if the rod is positively charged the water molecules will be attracted to the rod due to the negatively charged side of the water molecules. But if the rod is negatively charged, the stream of liquid water will also become attracted to the rod as the positive side of the water molecules will be attracted to the negatively charged rod. ...read more.

Middle

To ensure that the burette is vertical and the tip is in the same position for each trial, another two retort stands with a card with a cross point was placed permanently behind the burette. Another mark was drawn on the card to guide the height of approach the charged rod to the stream (as shown in diagram 1). 2. A white tile with a marked cross was placed in the collecting tray such that the centre of the cross was directly underneath the burette, then an A4 sheet of graph paper was placed of the tile (as shown in diagram 2). 3. Another beaker filled with approximately 400ml of distilled water was heated to approximately 65 degrees centigrade using a Bunsen burner (as shown in diagram 4). Some of this water was transferred to the burette using a 100ml beaker and a funnel. 4. Once the water was transferred to the burette, the temperature was measured using a thermometer. 5. A glass rod was electrostatically charged by rubbing it with a dry silk cloth 15 times backwards and forwards. 6. The tap of the burette was fully opened and the charged rod was placed close to the stream of water at the level indicated by the mark on the paper behind. ...read more.

Conclusion

The charge of the rod The charge of the rod will be rubbed 15 times before each trial to ensure that the charge of the rod does not vary significantly and in turn, affect the results collected. The thermometer used The same thermometer will be used to make sure that the degree of error is the same and that it does not vary when measuring the temperature of the water. Temperature of the water The temperature of the water will be attempted to be kept at approximately the same temperature as it will be observed regularly and adjusted if necessary. The experimenter The degree of error is different for different experimenters; to avoid this, the same experimenter will conduct the experiment for the entirety of the experiment. Data Table Distance from origin to the maximum distance of water deflected (cm) Trail 1 Trail 2 Trail 3 Trail 4 Trail 5 Average Water at 60? Water at 10? Safety * Handle with care when using the Bunsen burner, as it can be dangerous due to the heat produced. * Hot water will be used in this experiment, be careful when handling the hot liquid. * Appropriate clothing shall be worn while conducting the experiment. * Appropriate footwear shall be worn while conducting the experiment * Act in an orderly manner, as not to cause harm to others and one's self and affect the results. ...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. IB chemistry revision notes

    o Cations have a smaller atomic radius than the parent atom they come from because they have lost an outer shell electron. o The ions get smaller as they have the same electronic structure but a greater nuclear attration. * The Halogens (Group VII)

  2. testing liquis for polarity

    find the relationships between the Lewis structure or the molecule structure and the deflection the substances caused when they were near to an electrically-charged rod.

  1. Viscosity lab. Research question:- How is the viscosity of water affected by ...

    Cold water graph:- Hot water graph:- Conclusion:- As explained before, the inverse of the slope of the graph represents the rate of viscosity, so:- Analysis for cold water:- Hence:- Analysis for Hot water:- Hence:- Data is now sufficient to draw the conclusion that:- This experiment showed that the rate of

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

    as compared to even the most accurate measuring cylinder (10 ml, � 0.1 ml). This reduced the overall uncertainty of the equipment used and hence the general error of the experiment, and made the data more relevant and certain. On the other hand, it was made sure sufficient data was

  1. Chemistry HL Design prac

    - 10 seconds - 20 seconds - 30 seconds - 40 seconds - 50 seconds - 60 seconds Dependent The angle of deflection of the flowing water will be measured with grid paper with a smallest increment of 1mm. A line will be drawn on the grid paper from the

  2. Chemistry Extended Essay - Viscosity of Xanthan Gum solutions

    Background Information 3.1 Xanthan Gum in Solution Xanthan gum solution varies from soft gel to pseudoplastic, depending on concentration6. The viscosity, the concentration value at which transition from soft gel to pseudoplastic behaviour occurs and the degree of pseudoplasticity are all directly related to gum concentration7.

  1. Factors Affecting Angle of Deflection

    been deflected from the norm * This should be repeated a minimum of three times, until the results are consistent * The rod should then be placed a maximum distance away from

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

    the experiment went sometimes under the preferred degree which obligates the one who does the investigation to rise the temperature by Bunsen burner. And this method mostly resulted in the unwanted high temperatures during the experiment. Thus this kind of temperature deviations can affect the results such as less solubility

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