characteristics that indicate that they are a acid for each of those

Question

photon336 · Answer

Sulfuric acid (Car batteries) 
CH3COOH Acetic Acid (Vinegar
 CH3C6H5O7 Citric Acid found in lemons 
lactic acid (C3H6O3) found in milk 
ascorbic acid (C6H8O6) is Vitamin C.

photon336 · Answer

All acids lose a proton H+

ccchristian1 · Answer

what are the characteristics that indicate they are a acid

ccchristian1 · Answer

okay

photon336 · Answer

well

photon336 · Answer

also if you look at them almost all of them have COOH accept for sulfuric acid. ad they lose a proton to become COO-  + H+

photon336 · Answer

Sulfuric acid is a little different |dw:1437888927050:dw| 

it has 2 OH groups, and you can lose a proton from each

photon336 · Answer

|dw:1437888973869:dw|

see how it lost a proton? that's how we know it's acidic