I have an 8 year old who does very similar chores. Every morning he goes through his list of 'jobs' before school:
making his bed, opening curtains, making sure lights in his room are turned off
getting cereal out and putting it into bowls for himself and his 3 year old brother
opening lounge curtains
putting laundry in washing machine for me (I sort it and chuck it down the stairs, he puts it into the machine)
feeding pets (I get the bowl of food ready though).
For these he gets an extra 50p pocket money per week and he is quite proud of having his 'jobs' I think - I might occasionally have to remind him but most mornings he just gets on and does them.
He is also expected to put away shoes and coat when he comes in (not just dump them on the floor!), keep his room tidy, help with clearing away after meals, help with tidying lounge and/or garden if we've been playing out there, fold his school clothes ready for school the next day and put his dirty laundry in the laundry box. I will also admit to asking him to fetch things for me from time to time (we have a 9 week old, I'm breastfeeding, so quite often DS will be asked to bring me my water bottle or fetch a clean muslin or whatever).
The thing is, when you write jobs down it does tend to look like more than it is! All of the things DS helps out with are just part and parcel of daily routine and just kind of happen as the day goes on, I certainly don't ever feel that he misses out on playing time because of them.
So I don't think you are being unreasonable at all. I agree with whoever posted about trying not to overload him with too much responsibility but what you have described doesn't sound like too much responsibility.