Define Bronsted-Lowry acids and bases. Which of the following ions will react wi

Question

Define Bronsted-Lowry acids and bases. Which of the following ions will react with water in a hydrolysis reaction; K^+, Ba^2+, Cu^2+, Zn^2+, F^-, SO_3^2-, Cl^-? For those ions in question 2 that undergo hydrolysis, write net ionic equations for the hydrolysis reaction. The K_a for HCN is 4.9 times 10^-10. What is the value of K_b for CN^-? What are the conjugate base and conjugate add of H_2PO_4^-? From what add and what base were the following salts made: K_2SO_4, NH_4Cl, and Ca(NO_3)_2? Define the term salt. Tell whether 0.1 M solutions of the following salts would be acidic, neutral, or basic: Bacl_2, CUSO_4, (NH_4)_2SO_4, ZnCl_2, NaCN. If the pH of a solution is 6, what are the hydrogen- and hydroxide-ion concentrations? The pH of a 0.1 M MCl (M^+ is an unknown cation) was found to be 4.7. Write a net ionic equation for the hydrolysis of M^+ and its corresponding equilibrium expression K_b, Calculate the value of K_b. What is the pH of a solution that is 0.20 M HC_2H_3O_2 and 0.40 M NaC_2H_3O_2? K_a for acetic add 1.8 times 10^-5.

Explanation / Answer

1 ) an acid is a proton donar and base is proton acceptor

2) Cu+2 , Zn+2 , SO3-2

3)

Cu+2 +2 H2O ---------------->Cu(OH)2 + 2H+

SO3-2 + H2O -----------------> HSO3- + OH-

4) Ka = 4.9 x10^-10

   Kb = Kw / Ka = 1.0 x 10^-14 / 4.9 x 10^-10

   Kb = 2.04 x 10^-5

5) K2SO4 ---------------> base KOH , acid H2SO4

    NH4Cl -------------------> base NH3 , acid HCl

Ca(NO3)2 -------------> base Ca(OH)2 , acid HNO3

6) the salt is product formed from acid and base reaction

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

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