I have read on the faq section of the google physics group that sometimes ice re-freezes faster after hotter water is added to it.How can this happen -
surely something hotter takes longer to cool do...
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In my textbook, it had
2Cu2+(aq) + 4I-(aq) -> CuI(s) + I2(aq)
How does that work? First of all it's not balanced. It should be 2CuI(s). But how does CuI(s) form. It should be CuI+.
The bo...
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My teacher mentioned that if an element has a neutron to proton ratio of 1.2 or higher than the element is radioactive. He also said there is on exception to this when the N/P ratio is lower than 1.2,...
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Sulphate ions and nitric acid wouldn’t react? Is it because sulfuric acid is a very strong acid, while nitric acids are very weak. So the conjugate base of sulfuric acid which is sulphate ions i...
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Salts such as Na2SO4 are generally regarded as salting out (at least in colloid chemistry I think).
What is the difference between this and a salting in salt?
And is NaOH salting in?
And also, ...
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so there's a mixture of CO2, SO2, and H2O gases in a 21L tank. Pressure inside is 850Torr at 45*C. if SO2 concentration in mixture is 7.95x10^3 ppmv (where ppmv=[V component/V total mixture]x10^6), fi...
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From what I gather both ionic and covalent bonds transform all the elements involved into ions. Does that mean every chemical compound that exists consists of ions and not atoms or are there chemical ...
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Is a pipette used to transport the aqeous reactant to the flask.
Is a burette used to transport the titrant in the flask.
So a pipette is smaller than a burette? What other differences between th...
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In medicinal chemistry fluorine atoms are often used on scaffolds in order to increase metabolic stability of a particular compound. The problem with working with reactants that contain fluorine is t...
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What is the point of using the redox convention in describing reactions involving covalently bonded species? To me it is a very unnatural thing to do? A reaction can occur with a rearrangement of atom...
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Hey everyone!
I am new here and I need MAJOR help on an experiment. It's grade 12 university prep Chemistry course that I am doing via correspondance. Basically I have read through equillibirum notes...
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For my Production and Layout II class I need to come up with a a fictional product I'm trying to sell in the ad. Getting to the point, I want to use a POM tea [http://pomwonderful.com/pomTeaHome.html]...
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What are some experements I can do with Hydrogen, and what are some safety concerns, besides explosions, that I should be worried about. What is an efficent method for producing and capturing Hydrogen...
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is it mean that chemical property can be reflected by the chemical changes??
can physical property affect the chemical property ??
Is the ionization enthalpy , electon affinity belongs to a type of ...
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Hi all,
i am hoping to make sodium bisulphite by passing so2 through NaOH.
However, i was wondering if anyone has a link or a method to a titration for calaulating % sodium bisulphite,
Regard...
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I have few questions for my final exam and its a take home please someone help!
1) Sort in list strongest to weakest; covalent, hydrogen, dipole, intermolecular, ionic.
2) Water molecule and am...
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The majority of the ozone in the atomsphere occur because of UV breaking O2 into O and than O + O2 -> O3.
But for the half of the hemisphere where no sun is shining, this chemical reaction woul...
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How, if you're given a pair of molecules, would you decide which one might have a higher value for a or b?
As I understand for instance, a's value will be high if two molecules are attracted to eac...
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NH3 + H2O <--> NH4+ OH-
If i add a few drops of HCl to this solution which way would the equilibrium shift... and what are the changes to the system. Thanks....
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Someone likened cooking with titration. How accurate is this?
Is heat usually applied to titration? Does titration recquire physical labour to stir the solution? If not than these are two big diff...
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Hi,
We are using Varian Unity Inova 500 MHz NMR instrument.When we are taking 31P and 19F spectra we do not use any reference sample as like TMS etc. Our customer says us that they are not interpret...
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For a given molecule how could you calculate its degree of hydration?
For example with MgSO4, magnesium sulfide. How many water molecules will be attracted to it in theory? Is there a thoery to cal...
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What is the chemical reaction of club soda when you use electrolysis on it? I know club soda has water(H2O), CO2, and sodium citrate (Na3C6H5O7) in it. Thanks for your help....
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In a paragraph in the textbook "When CSIRO scientists were called in to investigate, they discovered that the cause was the oxidation of iron pyrites in these area, much of which had been exposed...
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The textbook said if you add dry ice (carbon dioxide) to lemonade or soda water, the pH of the substance (which is already acidic) will become even more acidic. Why?...
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