General Practical Techniques
General Practical Techniques
Basic Concepts in Quantitative Chemistry
- Quantitative chemistry involves making precise measurements and observations, using these to calculate unknown quantities.
- Moles: Understand the concept of moles and the molar mass, which is the mass of one mole of a given substance.
- Avogadro’s number: Remember the number of particles in one mole of a substance, noted as 6.02 x 10^23, which is also referred to as Avogadro’s number.
Techniques in Quantitative Chemistry
- Titration: Learn the technique of titration where you add a solution from a burette to a known volume of another solution in a conical flask until the reaction is complete.
- Balancing equations: Develop the ability to balance chemical equations, which can be used to predict the outcomes of reactions and to calculate reactant and product masses.
Investigation Techniques in Chemistry Research
- Spectrometry: It’s an analytical technique key for identifying and studying chemicals. Possible types include mass, infrared and UV/visible spectrometry.
- Chromatography: Understand how to separate mixtures and identify substances through chromatography, which uses the principles of solubility and intermolecular forces.
- Nuclear Magnetic Resonance (NMR) Spectroscopy: An advanced technique used to obtain detailed information about the structure of molecules.
Evaluation and Communication in Practical Chemistry
- Always evaluate the reliability, precision and accuracy of quantitative experimental methods by considering any possible sources of error.
- Use appropriate terms and conventions to communicate chemical information and data effectively: this includes chemical symbols, equations, diagrams, graphs and tables.