3.5 Chemical Analysis Flashcards
What is chromatography used for?
Chromatography is a technique used to separate the components present within a mixture
In thin layer chromatography, the identity of a component can be indicated by what?
By the distance it has travelled, or by the time it has taken to travel through
the apparatus (retention time)
The results of a chromatography experiment can sometimes be presented graphically,
What does the y-axis usually indicate?
Quantity of a substance
The results of a chromatography experiment can sometimes be presented graphically,
What does the x-axis usually indicate?
Retention time
What is volumetric analysis used for?
Volumetric analysis involves using a solution of accurately known concentration in a
quantitative reaction to determine the concentration of another substance
What is titration used for?
Titration is used to determine, accurately, the volumes of solution required to reach the end-point of a chemical reaction
What does concordant mean?
Within 0.2cm³ of each other
What are standard solutions?
Solutions of accurately known concentration
Why is an indicator not required when potassium permanganate is used in a titration?
The solution turns colourless when reduced
What 2 pieces of apparatus are used in titration to ensure accurate measurement?
Pipette and burette
