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AQA Education, [1] trading as AQA (formerly the Assessment and Qualifications Alliance), is an awarding body in England, Wales and Northern Ireland. It compiles specifications and holds examinations in various subjects at GCSE, AS and A Level and offers vocational qualifications. AQA is a registered charity and independent of the government.
The A-level (Advanced Level) is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom and the educational authorities of British Crown dependencies to students completing secondary or pre-university education. [1]
Graded A*–E and worth up to 28 UCAS tariff points, [1] it is part of level three of the national qualifications framework. [ 2 ] The extended project was devised by Sir Mike Tomlinson in 2006, during his review of 16 to 19-year-olds' education, [ 3 ] and entered a pilot phase during the academic year 2007–8. [ 4 ]
[2] Making a standard solution requires great attention to detail to avoid introducing any risk of contamination that could diminish the accuracy of the concentration. For this reason, glassware with high degree of precision such as a volumetric flask, volumetric pipette, micropipettes, and automatic pipettes are used in the preparation steps ...
BS 7373-1:2001 Guide to the preparation of specifications [4] BS 7373-2:2001 Product specifications. Guide to identifying criteria for a product specification and to declaring product conformity [5] BS 7373-3:2005, Product specifications. Guide to identifying criteria for specifying a service offering [6]
Description: Paper applied the thermodynamic theory of steam engines to atomic level chemical reactions; i.e., it established equilibrium criteria necessary to predict the thermodynamic tendency of chemical reactions at constant temperature and pressure.
[1] [2] Some of the commonly used grades of purity include: ACS grade is the highest level of purity, and meets the standards set by the American Chemical Society (ACS). The official descriptions of the ACS levels of purity is documented in the Reagent Chemicals publication, issued by the ACS. [3] [4] It is suitable for food and laboratory uses.
A solvent dissolves a solute, resulting in a solution Ethyl acetate, a nail polish solvent. [1]A solvent (from the Latin solvÅ, "loosen, untie, solve") is a substance that dissolves a solute, resulting in a solution.