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  • Temperature See Attatched Document A Certain Point
    3,723 words
    Harry Fox 11 ST Biology Science 1 - Strand 1: Planning Aim In my experiment, my aim is to find out any correlation between rate of respiration of glucose by yeast and the mixtures temperature. I shall do this by conducting an experiment which will involve the timing of the yeast, water and glucose which has been mixed with a little methylene blue. I shall time how long it takes to revert to the original colour using a control. This shall be done at various temperatures. To obtain the best range ...
  • Evidence Table Of Results Concentration Of Acid
    531 words
    Rates of Reaction: Marble Chips and Hydrochloric Acid Rates of Reaction PLANNING AIM To find if changing the concentration of an acid will increase or decrease the rate of the reaction when marble is dissolved in hydrochloric acid. PREDICTION When the concentration of acid increases, more gas will be given off faster. I know this from my trial experiments. METHOD Since I will be working with strong acid, I will wear safety goggles while conducting the experiment. I will use Marble chips all of a...
  • 1 0 M Of Acid
    2,854 words
    Science Investigation Investigation: I have performed an experiment in order to see the effects of varying the concentration of reactants on the reaction between hydrochloric acid and marble chips. Planning: The experiment I have performed involved the reaction between hydrochloric acid and calcium carbonate (marble chips) to produce calcium chloride, water and carbon dioxide. The chemical equation for this reaction is: CaCO 3 + 2 HCl CaCl 2 + H 2 O + CO 2 Background Information: In order for a ...
  • Hydrogen Peroxide In The Experiment
    2,153 words
    I have to plan and carry out an experiment to investigate the way in which concentration of a substrate affects the rate of an enzyme-catalysed reaction. I will need to carry out some background information to find out what may affect my experiment. Background Information: An enzyme is a biological catalyst. They speed up the rate of a reaction however they are not affected themselves whilst doing this, this is why they are catalysts. Enzymes are made to be specific, this means that they can hav...
  • Graph Of Reaction Rate Vs Concentration
    1,425 words
    ... person to person. For my big measurements of liquid I will use a large measuring cylinder. I will not introduce a catalyst to the experiment neither will I increase the temperature of the liquids by holding their containers too long, and I will keep the area's temperature in which I'm working in constant. To be on the safe side I will try to keep the light intensity the same throughout the entire experiment by working in the shade. Prediction: I predict that as concentration of increases so ...
  • Increased Concentration
    1,192 words
    . Experiment for Chemistry Coursework For this investigation I am looking at how the concentration of acid can change the reaction and how I can explain this using collision theory. My Prediction: I predict that the greater amount of concentration the faster the reaction will take place. Therefore, particles in the two compounds will collide faster. Due to my prediction if it is correct, I expect to see the cross on the paper disappear faster. As I already know that increasing one quantity will ...
  • Ph And Surface Area Of The Potato
    2,230 words
    Introduction In this experiment, I will be studying the activity of the enzyme catalase. Catalase breaks down of Hydrogen peroxide H 2 O 2 into water H 2 O and oxygen O 2. catalase 2 H 2 O 2 2 H 2 O + O 2 catalase Hydrogen peroxide water + oxygen Enzymes are biological catalysts. They are made up of protein. They will only act upon one substance, is substrate. Enzymes only work at their optimum in a specific environment. There are many different factors in their environment, which affect an enzy...
  • 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 ...
  • Active Site On The Enzyme Molecule
    1,922 words
    Information on enzymes & rennin Enzymes are biological catalysts that speed up reactions without being affected so that they can be used to speed up another reaction. Enzymes are soluble globular proteins. Enzymes reduce the energy needed to make a reaction happen. This energy is known as the "activation energy". We need enzymes to stay alive, without them, the reactions in our body would take place far too slowly. Also, we need to be able to control how fast certain reactions take place, if we ...
  • Solution The Faster The Bead
    852 words
    Biology Coursework Alginate beads experiment Aim: To investigate the effects of substrate concentration on an enzyme reaction. Background: An enzyme is a protein formed in living cells and assisting chemical processes. Catalyst is a substance that speeds up reactions. The alginate beads are made of alginate and potato juice. The alginate bead experiment works because of oxygen bubbles which stick to the bead which makes the bead rise soon after dropping it into hydrogen peroxide. Hydrogen peroxi...
  • Reaction Between Potatoes Catalyse On Hydrogen Peroxide
    2,922 words
    DECOMPOSITION OF HYDROGEN PEROXIDE BY THE ENZYME CATALYSE POTATO. Introduction In the investigation we will be finding out how the reaction between Potatoes catalyse on Hydrogen peroxide (H 2 O 2) can study the effect of concentration on rate of reaction. The potato is the enzyme that will decompose the chemical Hydrogen peroxide. Hydrogen peroxide is a poisonous chemical, which is broken down in to water (H 2 O) and oxygen (O 2). Aim Investigating the decomposition of hydrogen peroxide by using...
  • Marble Chips Into The Conical Flask
    934 words
    A chemistry investigation to look at the rates of reaction between marble chips and hydrochloric acid. Task My task is to measure the rate of reaction between marble chips (CaCO 3) and Hydrochloric acid (2 Hcl). Diagram Plan The equipment I will be using for this experiment will be as follows: Conical flask, Delivery tube, Bung, Measuring cylinder X 2, Water trough, Water, Stopwatch, Marble chips, Hydrochloric Acid, water scales, clamp and Retort Stand.! WEAR SAFETY GOGGLES ! I will fill the wat...
  • Temperature Constant Throughout The Reaction
    878 words
    Planning What Am I doing? I am trying to do the reaction of sodium thiosulphate and hydrochloric acid, but I am varying the temperature that the sodium thiosulphate is before I add the hydrochloric acid. The test is to see the how long it takes after adding the hydrochloric acid for you not to see the black cross underneath the beaker. Method. To dot his reaction first I must measure out the amounts of sodium thiosulphate and hydrochloric acid. Then I will heat the sodium thiosulphate to the req...
  • Rate Of Reaction O
    1,625 words
    The Factors That Affect the Rate of a Reaction Planning: There are different factors which can affect a rate of a reaction such as: o Temperature o Surface area o Concentration o Catalyst Concentration - If the concentration of a solution is increased there are more reactant particles per unit volume. This increases the probability of reactant particles colliding with each other Pressure - If the pressure is increased the particles in the gas are pushed closer. This increases the concentration a...

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