Answer is: pH of methylamine is 12,2.
Chemical reaction: CH₃NH₂(aq)+ H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH⁻<span>(aq).
Kb(</span>CH₃NH₂) = 4,4·10⁻⁴.
c₀(CH₃NH₂) =
0,57 M.
c(CH₃NH₃⁺) = c(OH⁻) =
x.
c(NH₂OH) = 0,57 M - x.
Kb
= c(CH₃NH₃⁺) · c(OH⁻) / c(CH₃NH₂).
0,00044 = x² / (0,57 M - x).
Solve
quadratic equation: x = c(OH⁻) =
0,0156 mol/L.
pOH
= -log(0,0156 mol/L.) = 1,80.
pH
= 14 - 1,80 = 12,2.
Answer:
do you mean?
Explanation:
the structural formula of butyl pentyl ether
Answer:
The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw, and the wedge, although the latter three are actually just extensions or combinations of the first three.
Explanation:
Group 1A +1
Group 3A +3 or +1
Group 5A +5 or +3
The charges on an ion signifies the number of electrons that has been lost, gained or shared by an atom. These electrons are called valence electrons occupying the outermost shell of an atom.
Group 1A element will readily be willing to lose an electron giving them a charge of +1
Group 3A can lose either 1 or 3 electrons giving a charge of +3 or +1
Group 5A can lose either 5 or 3 electrons giving a charge of +5 or +3
The number of lost electron confers the stability on the configuration.
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