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

To investigate the viscosity of different concentrations of wallpaper paste and how it delays the fall of an object through a liquid.

Extracts from this document...

Introduction

Viscosity Aim: To investigate the viscosity of different concentrations of wallpaper paste and how it delays the fall of an object through a liquid. Simple Plan: I am going to take five measuring cylinders each with different concentrations of paste and place a rolled up ball of blue-tack in each measuring cylinder. I intend to time the fall of the marble through the wallpaper paste. With the results I shall attempt to find a pattern and draw an accurate conclusion. Equipment: * 5 100ml measuring cylinders (for the wallpaper paste) * 5 100100ml measuring cylinders (for the water) * 5 100ml beaker * Stopwatch * Piece of card * Glass rod * A ball of blue-tack * Solutions: Wallpaper Paste (ml) Water (ml) Solution 1: 100 0 Solution 2: 80 20 Solution 3: 60 40 Solution 4: 40 60 Solution 5: 20 80 Preliminary Work: * I have found from research, that heavy, dense liquids are more viscous. * Viscosity is measured in centipoises (cp) or millipascal- seconds. The formula for density is "K= �/ density" Kinematical Viscosity is measured in centistokes (cSt) * I have decided to use a stopwatch, which measures in seconds. Viscosity Viscosity is the measure of how easily a substance will flow. Therefore some substances are more viscous then others, because they are much thicker and therefore flow a lot slower, for example water will flow quicker then honey because it isn't as thick. ...read more.

Middle

The solutions will be labelled, 100% Wallpaper paste, 80% Wallpaper paste, 60% Wallpaper paste, 40% Wallpaper paste, 20% Wallpaper paste and 0% Wallpaper paste. Place a piece of card over each cylinder and on top place the blue-tack ball. 3. Make sure the stopwatch is ready. 4. Pull the card from over the cylinder; this will release the blue-tack ball into the solution. At the same time, however, start the stopwatch. 5. Stop the stopwatch once the ball reaches the surface of the cylinder. 6. Carry out this procedure until the results have been taken down for all 5 of the solutions. 7. Repeat the experiment 3 times so that any anomalies will stand out. Prediction: I predict that the solutions that are more viscous for example the solutions that are 100%, 80% and 60% wallpaper paste will take more time to reach the surface of the cylinder. The reason being viscosity is the resistance of a fluid to flow. Diluting or heating the solution can alter the viscosity of a fluid. In this experiment the solutions have been diluted and so therefore the more diluted solutions such as the solutions, which are 40%, 20% and 0% wallpaper paste will reach the surface of the measuring cylinder much faster then the more concentrated viscous solutions. ...read more.

Conclusion

Nevertheless, there is always room for improvements; such as I could have used a digital stopwatch to time the reaction as a digital stopwatch measures the time in seconds up to two digital places (0.00 seconds) This would automatically improve the accuracy of the results. Also I could have used the same measuring cylinder for each experiment, only that I would have to rinse and make sure it is dry thoroughly before carrying out the experiment. Although there is room for minor adjustments, the results seem accurate and reliable because they follow the same pattern. Thus I believe they support my prediction and collusion as both show that the more viscous the substance the less easily an object will fall through it. Also they both show that the wallpaper paste is more viscous than water, because when the solution was 100% wallpaper paste, the average time it took for the blue-tack ball to fall through was 63.3 seconds, however with 100% water the average result was 0.4 seconds. Therefore the wallpaper paste was much more viscous than water. To further prove my conclusions, I could conduct the experiment, investigating the concentration, however keeping the concentration the same, but changing the temperature of the wallpaper paste solution, to show that by y increasing the temperature, viscosity of the liquid decreases. This would reduce human error, as observing the rate at which the blue-tack ball falls and reaches the surface depends upon the observer. ...read more.

The above preview is unformatted text

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

  1. Acidic Solutions.

    done during the course, preparation of a solution of copper sulphate containing 124.84gdm-3, using a calorimeter to find the concentration of an unknown solution of copper sulphate, preparing a standard solution of potassium hydrogenphthalate and Experiment 3 from the " Negus 6th Form Centre science safety handbook and induction booklet".

  2. Investigating the effects of changing the concentration of different solutions on the refractive index ...

    n = 2 mm / 1.2 mm = 1.67 So the refractive index of water, n, is within the range of 1.67 - 2.2. In other words, the refractive index of water, n, is 1.94 � 0.27. Day 4 Even though the refractive index of water obtained is different from

  1. Investigating the Effects of Increasing Copper Sulphate Solution Concentrations on the Germination of Cress ...

    the total number of seeds germinated per concentration over the 8 samples. At first look, there does not appear to be a trend or pattern in the standard deviations for the 7 concentrations of copper sulphate. But if the 2 concentrations with the highest mean and total numbers of seeds

  2. How much Iron (II) in 100 grams of Spinach Oleracea?

    used in the titration I need to divide the volume of moles by 3 and then multiply it by 5. 0.000017925 mol dm-3 x 5 = 0.000386666 mol dm-3 3 Now that I know the mols of Iron (II) present in 5 cm3 of spinach extract solution I can use this to work out the moles of Iron (II)

  1. What Factors Affect The Cooling Of A Liquid

    * Container- I am going to use a glass beaker to hold the liquid. I am using this instead of a polystyrene cup, because the cup would hold residue heat, which would affect our results. Also a polystyrene cup is already quite insulated.

  2. To investigate the factors which affect how well an object retains heat.

    Radiation This is when the warm water particles vibrate the water particles next to them. This will give them more energy and will make the water there warmer. The water particles at the top of the can will radiate the heat energy into the surrounding air.

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