Effect of Concentration on Enzyme Activity Lab Report

Satisfactory Essays
Chemistry Unit 1 – Revision Questions
Chemistry 1A
1) Define an element. How many are there in the Periodic Table?
2) Write a table with the charges and masses of protons, neutrons and electrons.
3) Define atomic number and mass number.
4) Draw electron (energy level) diagrams for Be, S, Al, Cl and K. Also, write down the number of protons and neutrons for each. Finally, write the symbols (with mass no. and atomic no.)
5) Why have all Group 7 elements (halogens) got similar chemical properties?
6) Draw how ionic bonding occurs in LiCl, MgO and Mg Cl2.
7) Draw how covalent bonding occurs in CH4, F2 and H20 (H-O-H).
8) Balance this equation: C3H8 + O2 ---------> CO2 + H2O. Then, work out the masses each side to prove they are the same. (C = 12; H = 1; O = 16).
9) Write the name and formula of the chemical compound that forms limestone.
10) What is the name of the process by which carbonates are broken down by heating?
11) Draw a flow diagram of the limestone cycle, including chemical names and formulae.
12) Complete the general reaction: Acid + Carbonate --------> S…… + W…….. + C……… …………
13) Explain how limestone is used to make cement, mortar and concrete.
14) What is the test for CO2 gas?
15) What is the definition of an ore? Why might the economics of extraction change over time?
16) Draw a blast furnace and explain how iron is extracted from iron ore.
17) Why is the extraction of aluminium and titanium metals expensive? (Two reasons please)
18) Explain the technique by which copper can be purified. What is a use of pure copper?
19) Explain the processes of phytomining and bioleaching.
20) Why is recycling beneficial to the environment?
21) What % of iron comes from the blast furnace? What effect does this have on its properties?
22) Give some properties of low-carbon, high-carbon and stainless steels.
23) Why might an alloy of aluminium be preferable to the pure metal in aeroplane manufacture?
24) What name is given to the metals in

You May Also Find These Documents Helpful

  • Good Essays

    Lab Report (Effect of concentration on enzyme activity) Biology Noor Alawadhi 11- KC Introduction: An Enzyme is a protein, which is capable of starting a chemical reaction, which involves the formation or breakage of chemical bonds. A substrate is the surface or material on or from which an organism lives, grows, or obtains its nourishment. In this case it is hydrogen peroxide. This lab report will be explaining the experiment held to understand the effects of the changes in the amount of…

    • 619 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    The Effect Of Enzyme Concentration On Enzyme Activity The pancreatic duct in individuals who have cystic fibrosis frequently becomes blocked, reducing or preventing the release of pancreatic enzymes into the small intestine. The aim of this activity is to investigate the effect of a reduction in enzyme concentration on the rate of reaction, in this case the breakdown of protein by protease enzymes. Aim – Milk powder contains a white protein called casein. A white suspension of…

    • 1793 Words
    • 8 Pages
    Powerful Essays
  • Good Essays

    Chirag Patel Biology 157 Determining the Effect of Varying Substrate Concentration Question: How does concentration of potatoes affect the amount of oxygen produced with hydrogen peroxide and potatoes (enzymes)? Introduction The enzyme used for this experiment is Catalase. Catalase is inside mostly any living organism which uses oxygen. Its job is to break down hydrogen peroxide, into oxygen and water. (Formula) 2H2O2 ---> 2H2O + O2 (lab manual). There are limiting factors which if altered…

    • 443 Words
    • 2 Pages
    Good Essays
  • Good Essays

    between catalase concentration and the rate of reaction. This means when catalase concentration increases, the rate of reaction also increases. In other words, at 20% catalase concentration, the rate of reaction was only 4.220 mm/s while at 100% catalase concentration, the rate of reaction was 7.704 mm/s. This proves the positive correlation between catalase concentration and the rate of reaction. This occurs because as the enzyme concentration increases, there are more enzymes available to catalyze…

    • 1374 Words
    • 6 Pages
    Good Essays
  • Good Essays

    Affect of enzyme concentration to the rate of reaction Aim: With the experiment of protein solution, in this case egg white added to different pepsin concentrations (0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%) shows, as the egg white is a protein and the pepsin works as an enzyme, how a higher pepsin concentration and therefore a larger amount of enzymes effect the rate of reaction. Hypothesis: An increased concentration of pepsin speeds up the time the mixture needs to come clear. Introduction:…

    • 1460 Words
    • 6 Pages
    Good Essays
  • Powerful Essays

    LABORATORY REPORT (Click on the Save a Copy button on the panel above to save your report) Activity: Enzyme Activity Predictions 1. Sucrase will have the greatest activity at pH 6 2. Sucrase will have the greatest activity at 60 °C (140 °F) 3. Sucrase activity decreases with increasing sucrose concentration. Materials and Methods Effect of pH on Enzyme Activity. 1. Dependent Variable. amount of product (glucose and fructose) produced 2. Independent Variable. pH 3. Controlled Variables…

    • 1209 Words
    • 5 Pages
    Powerful Essays
  • Better Essays

    Enzyme Activity Lab Report

    • 2035 Words
    • 9 Pages

    Factors Affecting Enzyme Activity Abstract: In the following lab factors affecting enzyme activity, temperature, pH, enzyme concentration, substrate concentration and surface area will be tested on a beef liver enzyme to see if there will be any effect of performance. By doing 2 or more trials the results will show whether there is an effect to the enzyme from the following factors or not. Some of the factors may denature the enzyme and some will do nothing. Using a table qualitative and the…

    • 2035 Words
    • 9 Pages
    Better Essays
  • Good Essays

    Enzyme Activity Lab Report

    • 1074 Words
    • 5 Pages

    In this lab we tested the effect of temperature has on the rate of enzyme activity. The way we figured this out was by taking four different temperatures and testing the difference absorbance levels they produced every 20 seconds for about 2 minutes straight using a spectrophotometer. The important part of this experiment was the temperature the enzyme concentration was made at. What we got from the experiment was at lower temperature we got very low numbers for the absorbance, which gave us a lower…

    • 1074 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Title: Enzyme Activity Lab Purpose: To measure the rate of enzyme activity from a tissue abstract and experiment with different factors, such as the enzyme solution and the substrate with different hydrogen peroxide percentages and temperature, that affect enzyme activity. Hypothesis: 1) If the disk is placed into each beaker with 100 units/ml of enzyme solution, then the time for the disk to float will be 30 seconds. 2) If the temperature of the solution is at 5 degrees Celsius,…

    • 547 Words
    • 3 Pages
    Good Essays
  • Good Essays

    LAB: Substrate Concentration Affecting the Rate of Enzyme Activity: Through the Experiment of Beef Liver Puree and Hydrogen Peroxide Research Question Does different amount of substrate affect the rate of enzyme activities? Purpose To examine how different types of concentration (Hydrogen Peroxide) affect the rate of enzyme activity. Hypothesis We believe that if there is more substrate concentrated, then there will be an increase in the rate of enzyme activity. This is because…

    • 787 Words
    • 4 Pages
    Good Essays