Spraying Coke Classic on the weeds yesterday morning as a possible weed killer had no effect. Since it is 10X more acidic than white vinegar, I'll use the 2nd two liter bottle to make a scaled down version of that original home made weed killer with Dawn and Epsom salts that did quite a good job on my bricks driveway. But I'll wait until after Tuesday's rains. Paul Zmoda suggested I try the Coke when he saw I was seeking out phosphoric acid as a possible weed killer....Coke Classic has a pH of just 2.5 because of it. I've used it to remove mineral build up in my toilet bowl.