Which one of the following 0.10 M aqueous solutions has the highest pH? LiOH KHC

Question

Which one of the following 0.10 M aqueous solutions has the highest pH? LiOH KHCO_2 Nal NH_4I HI Which one of the following 0.10 M aqueous solutions has the lowest pH? HI HF KNO_2 Al(ClO_4)_3 NH_4Br Which one of the following 0.10 M aqueous solutions has the lowest pH? HF NaCH_3CO_2 KNO_2 Ca(ClO_4)_2 NaClO_4 Calculate the pH of a 1.0 M solution of aqueous sodium acetate. The value of K_a for acetic acid is 1.8 Times 10^-5. 9.37 4.63 7.00 2.37 9.26 Calculate the pH of a 0.136 M solution of aqueous sodium fluoride. The value of K_a for HF is 3.5 Timees 10^-4. 8.29 5.71 8.73 2.16 11.84

Explanation / Answer

6.

highest pH means most basic so

LiOH = Li+ + OH- highes OH concnetration

7.

lowest pH is the most aciedic, then

HI, since it is the only strong acid

8.

lowest pH is the most acidic

HF will be the acid with most H+ ions

9.

KA = [H+[A-]/[HA]

1.8*10^-5= (x*x)/(1-x)

x = 0.00423

pH = -log(0.00423) = 2.37

10.

Ka = [H+][A-]/[HA]

3.5*10^-4 = x*x/(0.136-x)

x = [H+] = 0.00672

pH = -log(0.00672) = 2.172

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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