An acid is a substance that increases the concentration of H3O ions in solution. Look at the reaction below of phenol (C6H5OH) with water: Upper C subscript 6 upper H subscript 5 upper o upper H (a q) plus upper H subscript 2 upper O (l) right arrow upper C subscript 6 upper H subscript 5 upper O superscript minus (a q) plus upper H subscript 3 upper O superscript plus (a q). Which reactant acts as an acid by contributing a H ion to create H3O in the chemical equation

i believe it is c.) 1575 j.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.