Edexcel A Level Chemistry:复习笔记1.7.3 Error & Uncertainty
Error & Uncertainty An error is the difference between a value or quantity obtained in an experiment and an accepted or literature value for an experiment There are two types of errors i...
Edexcel A Level Chemistry:复习笔记1.7.2 Titrations
Titration Calculations Volumetric Analysis Volumetric analysis?is a process that uses the volume and concentration of one chemical reactant (standard solution) to determine the concentration...
Edexcel A Level Chemistry:复习笔记1.7.1 Reacting Volume Calculations
Reacting Volume Calculations Reacting volume calculations are commonly associated with the reactions of gases All gases occupy the same volume under the same conditions At room temperature a...
Edexcel A Level Chemistry:复习笔记1.6.5 Amount of Substance Calculations
Amount of Substance Calculations As previously discussed, the amount of substance can be defined as the number of particles in a substance,?n, measured in moles (often abbreviated to mol) In...
Edexcel A Level Chemistry:复习笔记1.6.4 The Mole & the Avogadro Constant
The Mole & Avogadro The?Avogadro constant?(NA?or?L) is the number of particles equivalent to the relative?atomic?mass?or?molecular mass?of a substance The Avogadro constant applies to at...
Edexcel A Level Chemistry:复习笔记1.6.3 Applying Equations
Relating Observations to Chemical Equations Chemical equations give information about the reaction that is taking place Balanced equations show the number of particles participating in the r...
Edexcel A Level Chemistry:复习笔记1.6.2 Balanced Equations
Writing Balanced Equations A?symbol?equation is a shorthand way of describing a chemical reaction using?chemical symbols?to show the number and type of each atom in the reactants and product...
Edexcel A Level Chemistry:复习笔记1.6.1 Empirical & Molecular Formulae
Empirical & Molecular Formula Definitions The?molecular?formula?is the formula that shows the?number?and?type?of each atom in a molecule E.g. the molecular formula of ethanoic acid is C2...
Edexcel A Level Chemistry:复习笔记1.5.8 Predicting Structures
Predicting Structure & Bonding Different types of?structure?and?bonding?have different effects on the?physical properties?of substances such as their?melting?and?boiling points,?electric...
