Hi ive got a few chem questions im really stuck with if anyone could help?
i) 2SO2(g)+O2(g) <-> 2SO3(g)
If the pressure was decreased would the yeild in (i) be greater or less, and for (ii) be greater or less?
"Which homologous series is isomeric with alcohols?"
CH3CH2COOH(aq) <-> CH3CH2COO-(aq) + H+(aq)
"Write the expression for the dissociation constant, Ka"
Calculate Ka given that a 1.0x10-2 mol dm-3 solution of propanoic acid has a pH of 3.43"
If anyone can answer any of them that would be great thankyou
x Turn on thread page Beta
Chemistry quick questions.. easy if youre good :D watch
- Thread Starter
- 06-04-2011 14:11
- 06-04-2011 17:11
1) do you understand Le Chatelier's principle? Basically, in a reaction involving gases where there is a different number of molecules on the left versus the right, an increase in pressure will favour the direction producing the last number of molecules. Decreasing the pressure will do the opposite.
2) a homologous series is a series of compunds with the same ratio of atoms, eg alkanes CnH2n+2. Alcohols are series with the general formula CnH2n+1O
What else follows that pattern?
3) the dissociation constant is the ratio of the product of the concentrations of the RHS divided by the concentration of the LHS
Can you do it now?
so that allows you to calculate the concentration of H+ from the pH
the just plug that in to the equation from 3)