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AS practical skills and required practical activities key terms
Study AS practical skills and required practical activities with curriculum-aligned Key Terms resources, practice links, and exam-focused support.
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key terms
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AS practical skills and required practical activities
Key terms
Calibration
The process of adjusting the precision and accuracy of a measuring instrument by comparing it with a standard.
Tolerance
The allowable deviation from a specified measurement, indicating the precision of the measuring instrument.
Filtration
A technique used to separate solids from liquids or gases using a filter medium that allows only the fluid to pass through.
Heating
The process of raising the temperature of a substance, often used to induce a chemical reaction or to change the state of a substance.
Hazardous substances
Chemicals that pose a risk to health or the environment, requiring special handling and precautions.
Personal Protective Equipment (PPE)
Clothing and equipment worn to minimize exposure to hazards that can cause injury or illness.
Rate of reaction
The speed at which reactants are converted into products, typically measured in mol/dm³/s.
Catalyst
A substance that increases the rate of a chemical reaction without being consumed in the process.
Volumetric solution
A solution of known concentration prepared by dissolving a precise amount of solute in a specific volume of solvent.
Titration
A quantitative analytical method used to determine the concentration of an unknown solution by reacting it with a solution of known concentration.
Calorimetry
The measurement of heat changes during chemical reactions or physical changes.
Exothermic reaction
A reaction that releases heat to the surroundings, resulting in an increase in temperature.
Exothermic Reaction
A reaction that releases energy in the form of heat.
Endothermic Reaction
A reaction that absorbs energy from its surroundings.
Precipitate
An insoluble solid that forms when two solutions react.
Effervescence
Bubbling or fizzing that occurs when a gas is released from a liquid.
Distillation
A process used to separate components of a mixture based on differences in their boiling points.
Boiling Point
The temperature at which a liquid's vapor pressure equals the external pressure surrounding the liquid.
Functional group
A specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule.
Decolorization
The process of losing color, often used to describe the reaction of alkenes with bromine water.
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