Which one of the following species is amphiprotic?
Select one:
PO43–(aq)
HCl(g)
HSO4–(aq)
Cl–(aq)
For the system
NH2OH + CH3NH3+⇌ CH3NH2 + NH3OH+
95% 95 % 5 % 5 %
the state of equilibrium in the system is described by the percentages given. Which of the species is the strongest base in the system?
Select one:
NH2OH
CH3NH3+
CH3NH2
NH3OH+
An aqueous solution at 25.0 oC has an H3O+ concentration of 4.0 × 10–2 mol L–1. What is the OH– concentration of this solution?
Select one:
4.0 × 10–2 mol L–1
4.0 × 10–9 mol L–1
2.5 × 10–3 mol L–1
2.5 × 10–13 mol L–1
Hypochlorous acid, HClO, has a pKa of 7.52. What is the value of Ka for this acid?
Enter your result to 3 significant figures in E format - for example 1.23E-4 represents 1.23x10-4.
Answer:
A buffer solution was prepared by combining 0.222 M acetic acid (Ka = 1.82 x 10-5) and 0.278 M sodium acetate. What is the pH of this solution?
Select one:
4.94
4.54
4.84
4.64
1) Which one of the following species is amphiprotic : HSO4–(aq)
2) strong base = CH3NH2
3)
[H3O+] [OH-] = Kw
4.0 x 10^-2 [OH-] = 1.0 x 10^-14
answer : 2.5 × 10–13 mol L–1
4) pKa = 7.52
Ka = 10^-7.52
Ka = 3.02 x 10^-8
answer : Ka = 3.02E-8
5)
pH = pKa + log [base / acid ]
pH = 4.74 + log (0.278 / 0.222)
pH = 4.84
answer : 4.84
Which one of the following species is amphiprotic? Select one: PO43–(aq) HCl(g) HSO4–(aq) Cl–(aq) For the system NH2OH + CH3NH3+⇌ CH3NH2 + NH3OH+ 95% 95 % 5 % 5 % the state of equilibrium in the syste...
5. Which of the following species is amphiprotic in aqueous solution? (a) CH3NH2 c) NH4 (e) HSO (d) F (b) Н:0" 6, Use Table 15.2 (page 529) to decide whether the species on the left or those on the right are favored by the reaction. a. NH4 (aq) + H2PO4" (aq) # NH3(aq) + HsPO b. HCN (aq) + HS(aq) CN" (aq) +H2S c. HCO +OH CO2 H2S d. Al(H20)6 3+ +OH = Al(H20) s2+ OH 7. The equilibrium constant...