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How would you expect Rf values to change if you went from hexane-ethyl acetate solvent system to ethyl acetate only?
Wiki User
∙ 11y ago
the rf values would increase
Wiki User
∙ 11y ago
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Where is potassium acetate found?
As a soluble substance we wouldn't expect to find potassium acetate in nature.
In which solvent do you expect a solid that ionizes well to dissolve in?
Water or another polar solvent.
In what order from top to bottom would you expect to find naphthalene butyric acid and phenyl acetate on a silica gel TLC plate developed with dichloromethane?
napthalene, phenyl acetate, butyric acid
If you add a small amount of hydrochloric acid to 4 liters of water what type of solution would you expect to have?
You get a dilute solution. With 4 litres of water, you have more solvent (H2O) than solvent (HCl) than you originally had.
Codeine is presented in tablet mixtures and it has an Rf value of 0.6 what would you expect to be the effect of the Rf value of replacing the ammonia in the solvent by acetic acid?
GFNHVB
Where is potassium acetate found?
As a soluble substance we wouldn't expect to find potassium acetate in nature.
In which solvent do you expect a solid that ionizes well to dissolve in?
Water or another polar solvent.
Would you expect RF number of a pigment to change if we altered the composition of the solvent why or why not?
No, the solubility of the pigment molecule in its organic solvent is a factor involved in the separation of pigments. More soluble molecules move faster and generally travel further. Chlorophyll B is a great example since its only soluble in fat solutions.
In what order from top to bottom would you expect to find naphthalene butyric acid and phenyl acetate on a silica gel TLC plate developed with dichloromethane?
napthalene, phenyl acetate, butyric acid
What solvents change water's boiling point?
Any solvent can; the more ions it dissipates into, the more it will change the boiling point (in general). You shouldn't expect a very large change, however. Pressure tends to affect boiling point more than solvents.
Would you expect the R value of ta pigment to be the same if a different solvent were used?
No
What are the problems to expect when marrying an 18 year old girl?
in about 2-5 years she will change and expect you to. you wont change and expect her not to change, which in turns causes fights. so unless you change with her and how she likes expect to be divored as soon as they changes begin
How would you expect the intrinsic volume for a polymer in a particular solvent to vary with temperature?
generally, a polymer gets dissolved in a solvent (which implies lower density and higher volume). the higher the temperature, the quicker the process, so to answer: the intrinsic volume for a polymer in a particular solvent increases with the temperature.
If you add a small amount of hydrochloric acid to 4 liters of water what type of solution would you expect to have?
You get a dilute solution. With 4 litres of water, you have more solvent (H2O) than solvent (HCl) than you originally had.
If there is an ecxess supply of a good you can expect?
With no subsequent change in demand, you can expect prices to drop.
Would you expect the Rf value of a pigment to be the same if a different solvent were used Explain?
The Rf value would not be the same for every solvent as there are factors that allow each solvent to be unique. The attractive force, particle size and solubility of each solvent will create different results each time.
Is it reasonable to expect that these models will change soon?
no
