Dropping ph level

I need a quick natural way to drop the ph of my water/soil. Any household item would be great something I have around so I don't need to leave the house right now. I can get something better later, but am just looking for a quick fix. Thanx in advance.

Lemon Juice..

any idea how much per gallon, I am a bit over 7 right now and my soil is just under 7 I would like to get down near 6 obviously. thanx again

I would go with about 4-6 drops per gallon..then test it to see where its at..if its too low just add more water..or baking soda

thanx for being so propt, I gotta go to work now.