Hey there!
Values Ka1 and Ka2 :
Ka1 => 8.0*10⁻⁵
Ka2 => 1.6*10⁻¹²
H2A + H2O -------> H3O⁺ + HA⁻
Ka2 is very less so I am not considering that dissociation.
Now Ka = 8.0*10⁻⁵ = [H3O⁺] [HA⁻] / [H2A]
lets concentration of H3O⁺ = X then above equation will be
8.0*10−5 = [x] [x] / [0.28 -x
8.0*10−5 = x² / [0.28 -x ]
x² + 8.0*10⁻⁵x - 2.24 * 10⁻⁵
solve the quardratic equation
X =0.004693 M
pH = -log[H⁺]
pH = - log [ 0.004693 ]
pH = 2.3285
Hope that helps!
Answer:
Beryllium
Explanation:
No. of protons = 4
<em>No. of electrons = 4 (number of protons and neutrons are the same)</em>
No. of neutrons = 5
You need to look at the number of electrons of the outer shell (group no.) there are and how many shells there are (period no.)
Then look at the period table of elements to find the element
Answer:
the ability to do something or act in a particular way, especially as a faculty or quality.
Explanation:
