ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: Zahta on December 09, 2011, 05:27:32 pm
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whats an example of quantitative analysis?
And my teacher gave us this question.
Last year you studied a variety of chemical substances such as ionic,covalent and metallic. List some physical properties that can be used as a basis for their identification. Would those listed be used for qualitative or qualitative analyses?
Got no idea how to answer that question.
Thank you appreciate any help :)
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whats an example of quantitative analysis?
Volumetric analysis
(hopefully I haven't completely screwed up here, I am VERY rusty)
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thanks how about the other question?
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Hmm metallic bonding = lustrous surface? Dense? Hard?
Ionic was brittle?
tossing out ideas, not really sure..
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Colour is a property that can be used :)
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Also heat and electrical conductivity, reactivity, solubility in water
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ionic doesnt conduct electricity in solid but does in molten, metals conduct electricity whereas covalent does not. metals don't dissolve in water (only acid), some ionic dissolve in water by dissociating and forming ion dipole bonds (refer to solubility table) and covalent substances can only dissolve in water if functional groups are present to enable dipole dipole attraction or hydrogen bonding. heat conductivity and reactivity don't distinguish the three all that well and it wasn't taught in u1 course from memory! anything to do with "IDENTIFICATION" is qualitative e.g. properties that have been listed
quantitative analysis can be simple volumetric analysis/titration, gravimetric analysis etc.