On the voltage divider: The circuit you posted "loads" the voltage divider tap. You have two choices: make the divider out of power-burning low-value resistors chosen to make the divider have a much lower output impedance than the load, or use an opamp as a voltage follower to buffer a voltage divider made out of high value resistors.
Minor nit; a 741 will work on a single supply, but not one as low as 5V. It takes about 12V minimum. At that, the 741 is still a crummy opamp.
If the input and output of your circuit is referenced to 0V (Vss of the opamp), then the + should be on the right plate of the input capacitor, and on the left plate of the output capacitor.