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Coordinated science (double award) C1 notes
Notes aligned to Cambridge IGCSE syllabus points
£0.55 Preview RemoveCHM 2354 Aspirin Lab analytical chemistry
The purpose of this experiment was to determine the amount of acetylsalicylic acid contained in an aspirin tablet as a percent-weight concentration. To do this we titrated two acetyl salicylate solutions (one solution made using dissolved aspirin tablets in NaOH and the other using aspirin powder dissolved in NaOH) with standardized HCl. Using the data collected during these titrations, it can be calculated that each tablet contains approximately 80% acetylsalicylic acid. Determining that each tablet contains a high concentration of acetylsalicylic acid is important because the main beneficial properties of aspirin are caused by the presence of acetylsalicylic acid.
£12.50 Preview RemoveFuels -Introduction
General Aspects of Fuel: Organic fuels, Origin, classification and general aspects of fossil fuels. Solid fuels, Coal, carbonization of coal, manufacturing of coke by Beehive oven and by product oven method. Liquid fuels, Composition of petroleum, advantages and refining of petroleum. Cracking, reforming, polymerization and isomerization of refinery products. Synthetic petrol, Bergius and Fischer Tropsch process. Knocking, octane number and anti-knocking agents. Gaseous fuels, Advantages, manufacturing, composition and calorific value of coal, gas and oil gas.
£3.75 Preview RemoveCalcium-based Biominerals in Ascidians and Molluscs
Course name: Bio-inorganic Chemistry Course level: 4000 (4th year undergraduate module) 4th year research essay which explains about the biominerals present in Ascidians and Molluscs - specifically calcium carbonate, which are present in 6 different structures: calcite, aragonite, vaterite, calcium carbonate monohydrate, calcium carbonate hexahydrate, and amorphous calcium carbonate. I also wrote more on the introduction to deepen other's understanding on what ascidians, molluscs, biominerals and calcium based biominerals actually are.
£1.50 Preview RemoveOCR 2024 GCSE Combined Science A (Gateway Science) J250/09 Chemistry (Higher Tier) With Marking Scheme Merged
OCR 2024 GCSE Combined Science A (Gateway Science) J250/09 Chemistry (Higher Tier) With Marking Scheme Merged COMBINED SCIENCE A Oxford Cambridge and RSA Friday 17 May 2024 – Morning GCSE (9–1) Combined Science A (Gateway Science) J250/09 Chemistry (Higher Tier) Time allowed: 1 hour 10 minutes You must have: • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Combined Science A (Chemistry) (inside this document) You can use: • a scientific or graphical calculator • an HB pencil * J H 2 5 0 0 9 * Please write clearly in black ink. Do not write in the barcodes. Centre number First name(s) Last name INSTRUCTIONS Candidate number • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 60. • The marks for each question are shown in brackets [ ]. • Quality of extended response will be assessed in questions marked with an asterisk (*). • This document has 20 pages. ADVICE • Read each question carefully before you start your answer. 2 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 The diagram represents the particle model for a change in the arrangement of some particles. Which row describes this change? Type of change Explanation A chemical The particles break up and then join together in a different way. B chemical The particles stay the same but are arranged in a different way. C physical The particles break up and then join together in a different way. D physical The particles stay the same but are arranged in a different way. Your answer [1] 2 Which element in the table is a non-metal? Appearance at Melting point (°C) Electrical conductivity room temperature A silver liquid –39 high B orange-red solid 1083 high C yellow solid 113 low D silvery-white 3422 high Your answer
£5.00 Preview RemoveUnits of Measurement
Notes from the textbook "Modern Chemistry” by Holt, Rinehart, and Winston. Chapter 2: Measurements and Calculations; Section 2: Units of Measurement
£1.50 Preview RemoveTutorial (Spectrophotometry)
10 questions - theory and calculations For pre-university and university students.
£2.50 Preview RemoveAtmosphere Notes
A level Chemistry notes covering: -Composition of the Atmosphere -Ozone & CFCs -The (Enhanced) Greenhouse Effect -Group 4 elements -Collision Theory (inc. Maxwell-Boltzmann) -Catalysts -Infrared Radiation and Fission -Radicals (inc. Halogenation and Substitution reactions)
£2.50 Preview RemoveCharacteristics of Carbon-Based Compound
Carbon-based, or organic, compounds exhibit unique characteristics that make them essential to life and chemistry. Carbon atoms can form stable covalent bonds with other carbons as well as with elements like hydrogen, oxygen, and nitrogen. This bonding versatility leads to an immense diversity of organic molecules with varied structures and functions.
£3.75 Preview Remove