1)
HCl is strong acid , so completely dissociates.
Concentration of HCl = Concentration of H3O+
[H3O+] = 8.6 ×10-8M
pH = -log[H3O+]
pH = -log( 8.6×10-8)
pH = 7.07
2)
Mole = mass/molar mass
moles of Ba(OH)2 = 0.00398g/171.35g/mol = 2.323×10-5mol
moles of OH- = 2 × 2.323×10-5mol = 4.646 ×10-5mol
molarity of OH- = 4.646×10-5mol/L
pOH = -log[OH-]
pOH = - log( 4.646×10-5mol/L)
pOH = 4.33
pH = 14 - pOH
pH = 14 - 4.33
pH = 9.67
3)
Highest pH
RbOH(aq) NaCN(aq) CaBr2(aq) CH3NH3Br(aq) HClO4(aq) |
Lowest pH
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