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  • Reaction Of Acid And Limestone
    1,479 words
    Aim In this investigation I am aiming to find out how the concentration of acid affects the rate of reaction with Calcium Carbonate (Limestone). Hypothesis I predict that the higher the concentration of acid then the faster the rate of reaction. Calcium Carbonate + Hydrochloric Acid = Carbon Dioxide + Calcium Chloride CaCO 3 + 2 HCl = CO 2 + H 2 O + CaCl 2 I predict this because when a chemical reaction takes place, the atoms are broken loose from their arrangements and re-arranged into differen...
  • Concentration Of Hydrochloric Acid In My Experiment
    1,121 words
    Scientific Knowledge There are many different factors that can effect the rate of a reaction, some of these are as follows: Temperature- The higher the temperature the more energy each particle will have which means it will vibrate more, causing the amount of collisions to increase. If the particles collide more, the rate of reaction is increased. Concentration of Acid- The higher the concentration of acid, the more partials there are to react with. If for example the concentration of Hydrochlor...
  • Surface Area And Volume Of A Cell
    348 words
    Cells Cells are some of the smallest organisms around. All living things consist of cells, and yet they are invisible to the naked eye. How and why are they so small? Well, cells are the basic structural and functional units of life. As life on earth has evolved into organisms of different species and living things, two basic laws of nature have dictated why cells have remained so small. One is simply, shorter is faster. This is true as far as diffusion is concerned and also in terms of chemical...
  • 500 Cm 3 Flask The Rate
    2,136 words
    Biology Coursework Practical - Heat Loss The aim of this practical is to find to what extent does the surface area to volume ratio of an object affect the rate of heat loss from the object Hypothesis: As the ratio of surface area to volume of an object decreases the rate of heat loss from the object will also decrease. Objects with the same surface area to volume ratios loose heat at the same rate so long as there are not other variables involved. Background Knowledge: The surface area to volume...
  • Surface Area Of 5 9 Cm 3
    2,615 words
    Is there a relationship between the quantity of enzymes and the rate of reaction with the substrate? Hypothesis Using my scientific knowledge my hypothesis is that as the quantity of enzymes increases so will the rate of reaction. Reasons for this hypothesis I am basing my hypothesis on a hypothesis known as the 'lock and key hypothesis. ' It explains that when an enzyme substrate complex forms by means of a spontaneous reaction the substrate fits into the active site like a key fits a lock. It ...
  • Greater Surface Area For The Acid
    447 words
    An Experiment To Investigate If Particle Size Affects The Amount Of Carbon Dioxide Produced Hypothesis I think that the smaller limestone chips will produce the greater amount of carbon dioxide than the larger chips as there will be a greater surface area for the acid to react upon. This is because the greater the surface area the higher the amount of collisions between limestone and acid particles. Therefore the smaller chips will lose a greater mass. The formula for this reaction is Marble + H...
  • Larger Area For The Hydrogen Peroxide
    570 words
    Aim To investigate what affect the surface area of potato (raw) has on the production of oxygen. Introduction Plant cells in potato have an enzyme called catalase which turns bleach (H 2 O 2) hydrogen peroxide into O 2 and H 2 O. Catalase is the fastest working enzyme and is found in many living things, it speeds up the breakdown of hydrogen peroxide, and the bubbles released are O 2. The reaction taking place is 2 H 2 O 2 = 2 H 2 O + O 2. Prediction I predict that the higher the surface, the mo...
  • Surface Area Of Leaves
    239 words
    Adaptations For Survival – Methods Adaptations For Survival – Methods Of Avoiding Extremes Of Climate. Dormancy 1. Plants Annuals -survive cold / drought as seeds. Perennials – organs of perennation – bulbs, tubers, rhizomes. Deciduous trees loose leaves, reducing transpiration rate. 2. Animals Small mammals and ectotherm's hibernate. Need to increase body fat. Reduced metabolic rate. Migration e.g. Many birds migrate to find improved food sources and warmer temperatures....

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