Clare Chong P2 ! ! ! ! ! Chemistry Practical 4: Measuring rate of reaction Aim of experiment: To determine the rate of reaction when the concentration of I2 increases. ! ! ! Chemical equation: 2Fe3+ + 2I- --> 2Fe2+ + I2 ! ! ! Apparatus & materials: Apparatus Quantity 50ml Pipette 1 10ml Pipette 1 Pipette bulb 1 100ml beaker 2 50ml Burette 1 250ml Conical Flask 6 Timer 1 Distilled water 100ml or more 50ml Measuring
Premium Chemistry Titration Laboratory glassware
centuries has produced results over which opinion is sharply divided. Science‚ originally intended to conquer and harness the forces of nature for the good of man‚ is looked upon by some as the chief cause of the suffering of humanity today. On’the other hand‚ there are a good many people who consider science to be the harbinger of all progress‚ prosperity and comfort. The contro¬versy has been raging for a long time‚ though science goes on taking long strides .obviously regardless of the conflicting
Premium Nuclear weapon Human
Major Chemistry questions: 1. Analyse the progress in the development and use of a named bioploymer. This anslysis should name the specific enzyme(s) used or organism used to synthesise the material and an evaluation of the use or potential use of the polymer produced related to it’s properties. Polyhydroxybutanoate (PHB) Progress Analysis: - Bacteria first used to make PHB in 1925 at Pastuer Institute in Paris. - In 1970’s adopted by Imperial Chemical Industries (ICI) – Alcaligenes
Premium Chemical industry Escherichia coli Bacteria
Shakespeare both instill a figurative idea of immortality throughout the course of time long after the writers have passed on. Shakespeare plants his beauty within the lines of the poem after his lover’s physical beauty deteriorates with time. Spencer‚ however‚ keeps the memory and love for a woman. Although both poems are about two different subjects‚ the main theme that connects them is that they immortalize two non-physical ideas. The hope of every writer is to have their work famous and studied
Premium Poetry Personification Edmund Spenser
Name: Shahid Hussain Subject: Chemistry Teacher: Dr Ramani Topic: Comparing Solutions Saturated Solutions | A solution that can hold no more of the solute at a particular temperature is said to be a saturated solution at that temperature. | When someone adds sugar to iced tea‚ the sugar disappears. If you add one teaspoon of sugar to iced tea‚ you get an unsaturated solution. If you keep
Premium Concentration Chemistry Solution
Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
Premium Water Ideal gas law Melting point
minerals to adapt their needs‚ how to build roads and houses to expand their territories. People continuously improve their knowledge and develop technologies to improve their lives. It is undeniable that these activities of human beings make their lives better than ever before. Nevertheless‚ those activities also cause side-effects to the Earth because of pollution‚ deforestation‚ and exaggerated natural resources exploitation. Nowadays‚ pollution becomes one of the most concerned problems. Because of
Premium Oxygen Atmosphere Earth
Chemistry Notes Cracking: * 2 types of Cracking; Catalytic cracking and Steam/thermal cracking. * Catalytic cracking‚ using a catalyst called Zeolite (Aluminosilicate)‚ 500 degrees C‚ in the absence of air and at pressures just above atmospheric * Thermal cracking is done without a catalyst; steam is passed through very hot metal tubes at 700-1000 degrees C at just above atmospheric pressure. * This is used to break down longer chains of unsalable hydrocarbons into smaller salable
Premium Atom Chemistry Atmosphere
LP 2 Assignment: Junk Science Article 1: Energy and nutrient flow through ecosystems 1) I did not see any author and I was skeptical about entering the site as it had a security certificate warning. 2) Other than informational gain I don’t see any other profit. Naval Facilities engineering 3) It does cite reliable source‚ such as the EPA web site 4) Yes it is unbiased and appears to be all facts no opinions 5) RSC.org also discusses environment risk assessment and is written by a Dr. who
Premium Source Critical thinking Petroleum
when particles obtained cannot be divided further. Democritus called these indivisible particles atoms (meaning indivisible). How and why elements combine and what happens when they combine. Antoine L. Lavoisier laid the foundation of chemical sciences by establishing two important laws of chemical combination. (a) The Law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction. (b) The law of constant proportions which is also known as the law of
Premium Atom Chemistry Molecule