Of course, #pH# values depend on the concentration of #H_3O^(+)# ions, so the numbers given here are rough estimates of what #pH# readings you might expect when investigating acids in your home.
If you have soda -(specifically, Cola) It contains phosphoric acid. #H_3PO_4(aq)#, which is why Cola gives a low #pH# when measured using a probe.
It has a #pH# of roughly 2-3, because it is a weak acid.
You can also have acetic acid #CH_3COOH(aq)#, in vinegar in your kitchen. Another weak acid with a similar #pH# range to that of phosphoric acid.
We can also find Citric acid, #C_6H_8O_7# in lemons. It is another weak acid and also is within the range of acetic acid and phosphoric acid
In a traditional car battery, we can find sulfuric acid #H_2SO_4(aq)#, which has a #pH# of 1 or , as it is a strong acid.
I guess you can also say that you are also carrying around hydrochloric acid, #HCl(aq)# in your stomach- which is another strong acid, giving it a #pH# value
You can also make Carbonic acid (#H_2CO_3(aq))# by carbonating water, which has a #pH# around 5.6, making it only slightly acidic.
That's all I can come up with, hope it helped!
