Answer:
9.93
Explanation:
Your value for Kw is incorrect. The correct value is 5.48 × 10^-14.
pH + pOH = pKw
3.30 + pOH = -log(5.84 × 10^-14) = 13.23
pOH = 13.23 - 3.30 = 9.93
The pOH of the solution is 9.93.
The Higgs Boson is the only known particle that gives mass to other particles/atoms. Particle physicists and theoretical physicists are arguing that there are more than one type of Higgs Boson.
I don't see the symbols or the ions. sorry. can you type them out so I can help
Answer:
a) [HA] = 0.012 M; [A-] = 4 E-3 M
b) pH = 3.47
Explanation:
neutralization reaction:
∴ mol HA = 0.0015 mol
∴ mol A- = 0.0005 mol
∴ Vsln = 125 mL = 0.125 L
a) approx. concentration:
⇒ [HA] = 0.0015 mol / 0.125 L = 0.012 mol/L
⇒ [A-] = 0.0005 mol / 0.125 L = 4 E-3 mol/L
b) pH = ?
∴ pKa = 3.90 = - Log Ka
⇒ Ka = 1.26 E-4 = ([H3O+]*( 4 E-3 + [H3O+])) / (0.012 - [H3O+])
⇒ 1.512 E-6 - 1.26 E-4[H3O+] = 4 E-3[H3O+] + [H3O+]²
⇒ [H3O+]² + 4.126 E-3[H3O+] - 1.512 E-6 = 0
⇒ [H3O+] = 3.3866 E-4 M
⇒ pH = 3.4702
