please can u help me i really need help chemistry? - Freemason Hirams Travels Masonic Forums

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03-11-2008, 09:15 PM

Ivan C

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please can u help me i really need help chemistry?

Chem help please multiple choice?
use reference table for chemistry to help me please
1.which compunds solubilty decreases most rapidly as the temperature changes from 10 degres celcius to 70 degrees celcius?
a.NH4Cl
b.NH3
c.HCl
D.KCl my answer is B is it correct
2.A solution contains 14 g of kcl in 100g of water at 40 degres celcius.what is the minium amount of KCl that must be added to make this saturated solution?
a.14g
b.19g
c.25g
d.44g can u show me how u got it
3.which salt has the greatest change in solubilty between 30 degres celcius and 50degres celcius?
a.KNO3
b.KCl
c.NaNO3
d.NaCl

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