All Quantitative chemistry and stoichiometry articles – Page 4
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ExperimentA thermometric titration
Use this class practical to practise locating end-points in titration by measuring temperature during the reaction. Includes kit list and safety instructions.
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ExperimentA microscale acid–base titration
Use microscale titration to complete an acid–base neutralisation with sodium hydroxide in this class practical. Includes kit list and safety instructions.
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ResourceVintage titrations: tannin in wine
Explore Redox titrations using potassium manganate(VII), with this tannin experiment. Includes kit list and safety instructions.
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ResourceVintage titrations: sulfur dioxide concentrations in wine
Explore redox titrations using iodine, and discover the sulfur dioxide concentrations in wine. Includes kit list and safety instructions.
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ResourceGas volume
Calculate the gas volume created through the reaction of metals with acids. Includes kit list and safety instructions.
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ResourceFranklin’s teaspoon of oil
Interpret a historical experiment based on a full and interesting account of Franklin’s contribution to surface chemistry, includes kit list and safety instructions.
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Exhibition chemistryMagic beakers
Declan Fleming shows you how to capture your students’ imaginations with spectacular demonstrations
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ResourceOn This Day – Aug 08 : Henri Hess was born
He studied energy changes during chemical reactions, and postulated a method of predicting them – Hess’s Law. This is now routinely used by chemists to make predictions for enthalpy changes.
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CPDMoles and titrations
Dorothy Warren describes some of the difficulties with teaching this topic and shows how you can help your students to master aspects of quantitative chemistry
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ResourceChallenging plants: Plant science
An understanding of the structure and function of plants, the movement of materials through them and the chemical reactions that happen within them helps scientists to exploit the potential of plants.
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ResourceWriting ‘explosive’ equations | Chemistry Olympiad worked answers
Practise writing equations in the context of explosives in this worked example of a Chemistry Olympiad question. Includes video walkthrough and transcript.
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ResourceTitration and phosphates in the environment | Chemistry Olympiad worked answers
Have a go at a worked example of a Chemistry Olympiad question on the use of titration to determine phosphate levels. Includes video walkthrough and transcript.
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ResourceSchools’ Analyst past papers 2014
Measure the acidity level of sprite, determine the weight of vitamin C in a tablet or test the copper content of water with these previous Schools’ Analyst competition challenges.
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ResourceA birthday cake candle timer
Use a candle to create a timer, and learn how combustion can be used to help in everyday life. Includes kit list and safety instructions.
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ResourceSchool’s Analyst past papers 2013
Challenge your students to carry out back titrations with these previous Schools’ Analyst questions
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ResourceOn This Day – Aug 09 : Amedeo Avogadro was born
He was one of the founders of physical chemistry and is most famous for Avogadro’s Law, which states that equal volumes of different gases contain the same number of molecules. In 22.4 litres of any gas at room temperature and pressure there are 6.02214 x 1023 molecules, known as Avogadro’s number.
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ResourceOn This Day – Jul 13 : Cannizzaro was born
He was the first chemist to see the full significance of Avogadro’s law. In the 1850s, Cannizzaro suggested comparing everything to the mass of a hydrogen (H) atom. This helped chemists establish chemical formulae and make reliable chemical calculations.
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ResourceOn This Day – Jul 09 : Amedeo Avogadro died
His hypothesis – now known as Avogadro’s Law – states that equal volumes of gases at a given temperature and pressure contain the same number of molecules. This is now widely accepted, and the number of molecules in a mole is referred to as Avogadro’s number, 6.023 x 1023.
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ResourceOn This Day - Jun 13 : James Maxwell was born
Maxwell helped to formulate electromagnetic theory, which links magnetism, electricity and light. He also investigated the kinetic theory of gases and developed part of the Maxwell-Boltzmann distribution, which helps scientists to understand the effects of temperature on reaction rates.