All Quantitative chemistry and stoichiometry articles – Page 4

Experiment
A microscale acid–base titration

In association with Nuffield Foundation

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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Vintage 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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Vintage 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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Gas volume

Calculate the gas volume created through the reaction of metals with acids. Includes kit list and safety instructions.
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Franklin’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.
Exhibition chemistry
Magic beakers

2015-03-09T00:00:00Z

Declan Fleming shows you how to capture your students’ imaginations with spectacular demonstrations
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On 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.
CPD
Moles and titrations

2015-01-06T00:00:00Z

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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Challenging plants: Plant science

In association with Reckitt Benckiser

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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Writing ‘explosive’ equations | Chemistry Olympiad worked answers

In association with The Wolfson Foundation

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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Titration and phosphates in the environment | Chemistry Olympiad worked answers

In association with The Wolfson Foundation

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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Schools’ 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.
Review
Putting chemistry in context with web simulations

2013-11-07T00:00:00Z

ChemVLab+ interactive learning exercises
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A 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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School’s Analyst past papers 2013

Challenge your students to carry out back titrations with these previous Schools’ Analyst questions
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On 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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On 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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On 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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On 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.
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Schools’ Analyst past papers 2012

Investigate the amount of active ingredient in aspirin tablets, paracetamol tablets and cold and flu remedies.