An aqueous solution is considered neutral if: a. the hydronium ion concentration is 10-8 M b. the hydroxide ion concentration is greater than the hydronium ion concentration c. the hydroxide ion concentration is 10-6 M d. the hydroxide ion concentration is 10-10 M e. the hydroxide and hydronium ion concentrations are equal

e. the hydroxide and hydronium ion concentrations are equal.

Explanation:

An aqueous solution is considered neutral if:

a. the hydronium ion concentration is 10⁻⁸ M. NO. When the hydronium ion concentration is lower than 10⁻⁷ M, the solution is basic.

b. the hydroxide ion concentration is greater than the hydronium ion concentration. NO.

c. the hydroxide ion concentration is 10⁻⁶ M. NO. When the hydroxide ion concentration is higher than 10⁻⁷ M, the solution is basic.

d. the hydroxide ion concentration is 10-⁻¹⁰ M. NO. When the hydroxide ion concentration is lower than 10⁻⁷ M, the solution is acid.

e. the hydroxide and hydronium ion concentrations are equal. YES.

"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"