With respect to the Bronsted-Lowry theory, an acid is: a) a substance that maint

Question

With respect to the Bronsted-Lowry theory, an acid is: a) a substance that maintains a constant hydroxide concentration in water. b) a substance that maintains a constant hydronium concentration in water. c) a substance that increases the hydroxide concentration in water. d) a substance that increases the hydronium concentration in water. e) a substance that increases both the hydronium and hydroxide concentration in water. A solution with a pH greater than 7 is considered to be: a) buffered b) caustic c) acidic d) neutral e) basic NH_2 + H_2 O rightarrow NH_3 + OH. In the reaction above, the acid and its conjugate base are: a) NH_2/OH b) NH_2/NH_3 c) H_2 O/NH_3 d) H_2 O/OH e) NH_2/H_2 O In the reaction above, the base and its conjugate acid are: a) NH_2/OH b) NH_2/NH_3 c) H_2 O/NH_3 d) H_2 O/OH e) NH_2/H_2 O

Explanation / Answer

42. According to Bronsted Lowry theory ,the acid, HA, can lose a proton to become its conjugate base, A

which means hydonium ion concentration will increase in solution.

option d is correct.

43.a solution with pH greater than 7 is considered to be basic or alkaline

a solution with pH less than 7 in considered to be acid

and a solution with pH 7 is neutral in nature.

44.if an acid loses a proton ,then its conjugate is formed

in the reaction given H2O loses proton to form OH-

thus H2O/OH- forms acid conjugate base pair.

option d is correct

45. When base accepts a proton then it results in conjugate acid

In above reaction,NH2- accepts proton to form NH3

hence NH2-/NH3 forms base and conjugate acid pair

option b is correct

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