During the lab, you measured the pH of common household items. Write net Brønste

Question

During the lab, you measured the pH of common household items. Write net Brønsted equations that show the acidic or basic nature of the following substances, given the pH. For polyprotic acids, only show one proton transfer. Remember that spectator ions are not included. (Use the lowest possible coefficients. Omit states-of-matter in your answer.)

(a)    apple (malic acid, H2C4H4O5) with a pH of 3.90

(b)    native lime (calcium oxide) with a pH of 10.50

(c)    fish (trimethylamine, C3H9N) with a pH of 8.20

(d)    toothpaste (soaps and sodium fluoride, NaF) with a pH of 8.50

Explanation / Answer

a)

net ionic

H2C4H4O5(aq) --> H+(aq) + HC4H4O5-(aq)

H2C4H4O5 --> H+ + HC4H4O5-

b)

CaO + H2O = Ca(OH)2

net ionic

Ca(OH)2 <--> Ca+2 + 2OH-

CaO + H2O --> Ca2+ + 2 OH-

c)

net ionic

C3H9N + H2O --> C3H9NH+ + OH-

d)

NaF --> Na+ + F-

net ionic:

F-(aq) + H2O(l) <-> HF(aq) + OH-(aq)

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.