Sulphuric

correct as the rate of diffusion is affected by the size of the agar cube. Using another example ‘When stirring, cubes will float so the upper surface have less contact with sulphuric acid’ which is true as sulphuric acid’s acid strength increases it makes it less dense ( according to the graph from the left ), and the sulphuric acid was 1M making the acid less dense allowing the agar to float, decreasing the surface area for the agar to touch the acid ( if not stirred ). http://www2.dupont.com/Cl

The main purpose of this experiment is to decipher whether acid is friend or foe? Acid is a particular substance with chemical properties including; turning litmus red, corroding metals, and neutralizing alkalis (bases). In the late 1800s, the Swedish scientist Svante Arrhenius suggested that acids are chemical compounds that, when dissolved in water, give a solution with a hydrogen ion activity greater then water, a pH less than 7.0. A base however is any compound that, when dissolved in water

likely acids the sodium hydroxide neutralised were sulphuric acid (H2SO4) and nitric acid (HNO3). The equations for the following reactions are: H2SO4 (aq) + 2NaOH (aq) → 2H2O (aq) + Na2SO4 (aq) HNO3 (aq) + NaOH (aq) → H2O (aq) + NaNO3 (aq) Using the titre volume, the pH of the samples can be figures out. Refer to Appendix for calculations. The concentration of acid in the Dhaka sample when assuming that the acid being neutralised is sulphuric acid is 0.00275 mol/L, and the pH is 2.56 (refer to

Reaction Candidate Name: Ben Dodds Candidate Number: 7158 School: Oundle School Completion Date: Introduction We are studying the reaction between zinc and sulphuric acid, the reaction is catalysed by copper sulphate and this experiment is to test whether the amount of drops effect the rate of reaction. Word Equation Zinc(s) + Sulphuric acid(aq) à Hydrogen(g) + Zinc Sulphate(aq) Symbol Equation Zn + H2SO4 à H + ZnSO4 This reaction is catalysed by Copper sulphate (CuSO4) Ionic Equation - Cancel

Determining the Ksp value for silver acetate. Introduction: An equilibrium constant for a solid substance that is dissolving in an aqueous solution is represented by the solubility product constant, where the concentrations of different ions from the solid substance (compound) are used to calculate the solubility product constant. If the solubility product constant vale is high then the substance is very soluble in an aqueous solution. The solubility product constant is denoted by Ksp, and for

Reflux Assemble apparatus for reflux as shown in figure 1. Begin pre-heating mantle. Measure and add 12mL of butan-1-ol and 9mL of ethanoic acid (glacial acetic acid) into a 50mL boiling flask. Add boiling chips. Slowly add 1mL of concentrated sulphuric acid. Reflux mixture for 30-40 minutes; ensure smooth boiling. Pour cooled refluxed mixture into a conical flask; apply stopper. Isolation Pour cooled mixture into a separating funnel containing 20mL of water. Shake and allow contents of solution

acetone is below, followed by the rate equation (where x,y,z and k are the values to be obtained): I2 + CH3COCH3 CH3COCH2I + HI -d[I2]/dt = k [I2]x [CH3COCH3]y [H+]z The procedure was performed as follows: For run 1, 20cm3 of acetone, 10cm3 of sulphuric acid and 145cm3 of water was added to a conical flask. 25cm3 of iodine was then added to this solution which started the reaction and immediately, 20cm3

Iron Titration Practical Introduction into Treating Anaemia with Iron Tablets Anemia, which is a condition that develops when there is a lack of red blood cells or isn’t enough healthy cells to support the body. The symptoms are:  Extreme fatigue  Pale skin.  Weakness.  Shortness of breath.  Chest pain.  Headache.  Dizziness or light-headedness. Causes of Anaemia can vary depending on the person. Iron Deficiency Anaemia can be caused by bleeding, for example if a person has lost blood

CHAPTER 2 Materials and Methods 2.1. Chemicals Table 2.0. List of chemicals Chemicals Manufacturer/Country ABTS(2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) ) Sigma Aldrich Laboratories, Canada Ascorbic Acid Sigma Aldrich Laboratories, Canada Camphene Loba Chemie PVT Ltd, Mumbai Chloroform -GPR Fisher Scientific, UK Dichloromethane - GPR Alpha Chimie Industry (ACI), Tunisie Dichloromethane HPLC grade Merck Millipore, France Diphenylamine Sigma

Task 2 – Scientific reasons Step 2.) With adding the sulphuric acid it was used as a catalyst. This resulted in the experiment being completed at a faster rate which reduced the amount of time that we were required to wait for the experiment to finish. This is due to the fact that the sulphuric acid allows the particles to move at a faster rate, allowing more kinetic energy to be made. By the particles then moving at a quicker pace it increases the amount of successful collisions, helping to increase