'To be in charge of' vs 'To be resposible for'

'To be in charge of' vs 'To be resposible for'

• To be responsible for doing something - it's your job to do something.
  To be in charge of doing something - you manage the 'something'. You may do it yourself and/or supervise other staff doing it.
  i.e. I was responsible for opening the post.= I opened the post.
  I was in charge of opening the post = I may have done it myself but I probably also managed the post in some way, and probably supervised others who opened the post.
• They are not necessarily the same. A person in charge may not take much or any responsibility for his/her own actions. Therefore, we can safely assume that the person in charge is not always responsible.
• http://frypound.blogspot.com/2007/01/being-in-charge-vs-being-responsible.html

'To be resposible for' vs 'To be resposible to'

• The meaning is different
  To be responsible for someone/something is describing your responsibility. Like being responsible for somebody's welfare, or being responsible for taking out the rubbish.
  To be responsible to someone/something is describing who or what you answer to or have an obligation to. Like a politician is responsible to the people who elected him/her.