Chemical Symbolism, Formulae And Reaction Quantities Flashcards
Define the terms Mono Di Tri Tetra
One
Two three four
If the name contains a prefix Valencia’s are not used to write the formula
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How do you find the valency for an element
The group which the element is in in the periodic table
Practice writing formulae for compounds valency
Eg potassium fluoride
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How do you find the Valencia’s for complex ions/groups
Look at data booklet
Practice writing compound names involving group/ complex ions using valency eg calcium carbonate,zinc nitrate
. Do it now x
Write formulae for transition metal compounds if Roman numerals are given eg iron(III) oxide. If no Roman numeral given metal valency =
Silver valency =
Metal valency = 2
Silver valency=1
What’s an ionic formulae for compounds
Practice writing formulae for these such as eg calcium oxide and magnesium hydroxide.
Where a negative and positive charged element attract each other
Number of moles,,, how would you find out the relative atomic mass of an element?
Moles?
Check data booklet
6.02 x10. 23
How do you calculate relative formula masses from relative atomic masses
Use an example
Mgcl2
24 + (35.5x2) = 95
What’s is the formula mass in grams called
GFM
Gram formula mass
Moles = mass divided by gfm
Practice doing moles mass and gfm of different compounds
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Using triangle calculate a given number of moles eg 0.1 g mol of bromine, 0.02 mol of sodium
Hydrogencarbinate (NaHCO3)
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Practice Where moles equal less or more eg
2 mol =60g
0.5mole=9g
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Practice balancing equations
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