wonders
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Posts posted by wonders
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what causes the temperature increase?
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My teachers wants us to design the lab ourselves. She gave us the materials and purpose, and we plan it.
-sigh-
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I don't know if that's the same thing my teacher meant. How do you use that method to identify unknown substances (aq) though?
The example she gave us is:
suppose
NaBr (s) --> Na+ (aq) + Br- (aq)
AgNO3 (s) --> Ag+ (aq) + NO6- (aq)
If the solutions are mixed,
Na+ (aq) + Br- (aq) + Ar+ (aq) + NO3- (aq) --> AgBr (s)
AgBr (s) is the precipitate, so what is in the mixture will be:
AgBr (s) + Na+ (aq) + NO3-(aq)
So now for the experiment we are given reagents KOH and H2SO4 to identify unknown substances. How do you apply her example in this case?
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Yes, I do know what reagents are. But I don't know how to conduct an experiment with them. The teacher gave us KOH (aq) and H2SO4 (aq) and asked us to use them to identify unknown substances. I have no idea what I should do.
Sorry if that doesn't make any sense to you.
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And what are the purposes of doing tests with reagents?
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Thanks guys!
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Argh, I'm starting to confuse elements with atoms, and homogeneous mixtures with molecules.
Is it like that:
Molecules contain elements which contain atoms which contain ions?
Molecules ---> Elements ---> Atoms ---> Ions?
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1. Just in general?
2. In chemical properties?
Thanks in advance!
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When water and methanol mix,
in Chemistry
Posted
I don't really get what you mean. What does solubility have to do with change in temperature?