Chemistry 3- Titration, Moles and Calculating Sturrrf

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Define a mole
The number of atoms of the element in 12g of carbon
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How can the mass of 1 mole of the atoms in an element be found?
The relative atomic mass in grams
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How could mass be converted to moles?
The moles of atoms/ amount of substance is mass over molecular mass
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How can moles be converted to mass?
mass is moles multiplied by molecular mass
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How can the molar mass be found from the mass and the number of moles?
Molar mass is mass over moles
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What is the equation for concentration?
AMOUNT, in moles over VOLUME, in dmto the 3
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How can cm3 be converted to dm3?
Divide by 1000
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What is concentration measured in?
Moldm-3
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How would you prepare a 1moldm-3 solution?
Weigh the molecular mass and dissolve in 1000 cm3 or 1 dm3 water
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What can concentration also sometimes be measured in?
gdm-3
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How can moldm-3 be converted to gdm-3
Multiply by the molecular mass, divide for the other way
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How can moles be found with the concentration and volume of a solution?
moles is concentration multiplied by volume over 1000
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Define Titration
The process by which the volume of solution needed to neutralise another can be found
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What apparatus is used to practice titrations?
Burette
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How is the end point determined in an acid/alkali Titration ?
Indicators and a colour change
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What are some practical points of doing a titration?
Solutions made up in a volumetric flask, the funnel of the burette must be removed after a titration for a refill to avoid affecting the solution level and a white tile is used under the flask to make the colour change more noticeable.
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How can a pure sample of a solution be made up?
Titration is carried out to identify the volume of solution needed to neutralise, then it is done again without indicator
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How would one produce pure salts, like sodium chloride salts?
Titrate to neutralise, evaporate most of with a dish and bunsen burner and finally evaporate to dryness slowly and naturally to leave behind the crystals.
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Other cards in this set

Card 2

Front

How can the mass of 1 mole of the atoms in an element be found?

Back

The relative atomic mass in grams

Card 3

Front

How could mass be converted to moles?

Back

Preview of the front of card 3

Card 4

Front

How can moles be converted to mass?

Back

Preview of the front of card 4

Card 5

Front

How can the molar mass be found from the mass and the number of moles?

Back

Preview of the front of card 5
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