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

Rates of respiration in crest plants, which are grown in different soils with a different pH

Extracts from this document...


Caroline van Bommel 23-04-2002 Group 4: Chemistry Lab Title: Rates of respiration in crest plants, which are grown in different soils with a different pH Aim: To measure the rate of respiration in Crest seeds which were embedded in different soils. Hypothesis: I think that the seeds, which are embedded in the soil sample with the most neutral pH, will show to have the highest rate of respiration. Variables: Control- amount of water added, the amount of soil, the amount of Crest seeds, the temperature of the soil and the duration of the experiment Independent- the area where the soil sample is from. Dependant- the amount of O2 consumption. Materials: For part 1 of the experiment Glass filter 100 mL Erlenmeyer flask For part 2 of the experiment Erlenmeyer flask 250 mL 100 mL beaker 10g of soil (either forest, moss, or potting soil) ...read more.


3) These aluminium packages must be placed it in the oven at 200oC for 30 minutes (so that all the water and organic matter will be desiccated.) 4) I placed 10 g of the backed soil in 8 ml of water and I stirred it gently. 5) Then I placed 10 drops of universal indicator fluid in the solution. (It was hard to see the colour, so we...read the next step) 6) With the aid of a filter I filtered out all the non-dissolved soil components, I repeated this until I had a clear solution left. 7) Once u have obtained a clear solution you can measure the pH of it. Part 2 1) Collect materials 2) From each type of backed soil we took 10g sample and placed it in the Erlenmeyer flask. ...read more.


Time Treatment 1 (mm3) Treatment 2 (mm3) Treatment 3 (mm3) 0 0.00 0.00 0.00 3 0.01 0.01 0.00 6 0.02 0.01 0.00 9 0.02 0.01 0.02 12 0.02 0.01 0.04 15 0.03 0.02 0.05 (The reason why I didn't continue recording the rate of respiration is because about 15 seconds after I hit the 15-minute mark the bubble in the treatment 3 pipette popped and directly after that the bubble popped in treatment 2 and then about a couple of seconds after that the bubble in treatment 1 also popped.) Graph 1: The amount of O2 intake in a time span of 15 min Table 3: The amount of Crest seeds that had sprouted after 4 days. Treatment nr. Origin of soil % Of Crest seeds that had sprouted 1 Forest soil 20% sprouted 2 Soil from underneath a moss plant 25% sprouted 3 Regular potting soil 90% sprouted ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment 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 AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    Tuberculosis and its treatment

    4 star(s)

    Before the attack is over, a few bacteria may escape into the bloodstream and are carried elsewhere in the body where are again walled in. If the immune system fails to stop the infection, and it is left untreated , the disease progresses to the second phase, where the germ

  2. out how different concentrations of the enzyme pectinase affect the degradation of the substrate ...

    I took care not to keep the distilled water or any other solution near any electrical points, in order to prevent any electrical shocks or short circuits. Using a different syringe I sucked up 0.8cm3 of the pectinase solution and 3.2cm3 of the distilled water and squirted it in the other beaker, labelled '20% Pectinase'.

  1. Investigating the effects of different lead chloride concentrations on the growth of cress seedlings

    By adding lead chloride to the cress seedlings, they will not be able to grow as growth will be hindered or stopped because of the lead chloride. Preliminary experiments will be carried out before the real experiment to test theories and methods.

  2. Investigating how prolonged exposure to its optimum temperature affects the respiration of yeast.

    * Conical Flask. * 100 cm� Beaker. * Stirring Rod. * Thermometer. * Delivery Tube. Kettle Possibility of scalding, especially with just recently boiled water. Conductor of the experiment / colleagues - While there are only two risks, it is imperative that the risks are minimised. Therefore, the experiment has to be conducted with utmost care, and

  1. Energy absorbed by a bouncing ball.

    As I am going to be looking at the relationship between the fraction of energy absorbed by the ball and the initial height, I will be varying the initial height that the ball is to be dropped from. The size and mass of the ball will remain constant because I will only be using one ball.

  2. The Magical Forest.

    They had a lot of extra energy because they hadn't really done anything strenuous for days so they were ready for just about anything. On this particular day they were feeling extremely mischievous. They wanted to do something they hadn't ever done before to get their adrenaline going, something exciting.

  1. Testing the Physical and Chemical properties of soils .

    Soil with a lot of clay in it is known as a clay soil; soil with a lot of sand in it is known as a sandy soil; soil with a lot of organic matter in it is known as organic soil, which is usually known as peaty soil and

  2. Title: Temperature Equilibrium in Squash Balls.

    It supposedly doesn't need to be warmed-up and is fundamentally different from the yellow, green and red balls I used. Rationale The WSF specifications for the yellow dot ball used in tournament play (see Appendix 2) are particularly concerned with the Rebound Resilience of the ball - this is the

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