What is the hydroxide ion concentration of a solution with a pH of 4? a. 10^10 b

Question

What is the hydroxide ion concentration of a solution with a pH of 4? a. 10^10 b. 10^-8 c. 10^-6 d. 10^-4 e. 10^-2 Which of the following would be the strongest acid? a. HXO b. HXO_2 c. HXO_3 d. HXO_4 Why is HF a week acid and HCI is a strong acid? a. Because HF has a stronger bond than HCI b. Because HF is more polar than HCI c. Because HF has hydrogen bonding d. The statement is untrue, they are both strong acids What is the pH of 0.10 M HNO_3? a. 0 b. 1 c. 2 d. 3 e. 13 What is the pH of 0.25 M KOH? a. 13.8 b. 13.4 c. 12.8 d. 12.4 e.10.5 Formic acid (HCHO_2) is weak acid with a K_a of formic acid is 1.9 times 10^-6, is a weak acid. What is the conjugate base of formic acid? a. H_2 CHO_2^+ b. HCHO_2^- c. CO_2^2- d. CHO_2^- What is the pH of a 0.10 M solution of formic acid? a. 44 times 10^-4 b. 3.0 c. 3.4 d. 6.7 What is the % dissociation of a 0.10 M solution of formic acid? a. 0.044% b. 0.044% c. 0.44% d. 4.4% A 0.30 solution of a weak base has a pH of 11.12 what is the K_b for the base? a. 4.3 times 10^-6 b. 5.4 times 10^-2 c. 1.3 times 10^-5 d. 5.9 times 10^-6 10.0 mL of 0.50M NaOH is added to 30.0 mL of 0.20 M HCI. What is the pH of the mixture? a. 0.25 b. 1.2 c. 1.5 d. 1.6

Explanation / Answer

1) pH =4

pOH = 14 - 4

pOH = 10

[OH-] = 10-pOH   = 10-10  = 1.0 x 10-10 M

answer = option a = 10-10M

2) answer =option d = HXO4

more the O atoms stronger the acid

3) answer = option a = HF has stronger bond then HCl

4) HNO3 is strong acid so

[HNO3] = [H+] = 0.1 M

pH = -log [H+]

pH = -log [0.1]

pH = 1.0

answer = option b = 1.0

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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