Answer is: pH of methylamine
is 11.78.<span>
</span>
Chemical reaction: CH₃NH₂(aq)+
H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH⁻<span>(aq).
Kb(CH</span>₃NH₂) =
4,4·10⁻⁴.<span>
c</span>₀(CH₃NH₂) = n(CH₃NH₂) ÷ V(CH₃NH₂).
c₀(CH₃NH₂) = 0.070 mol ÷ 0.8 L = 0.0875 M.
c(CH₃NH₃⁺) = c(OH⁻) = x.
c(NH₂OH) = 0.0875 M - x; equilibrium concentration of methylamine.
Kb = c(CH₃NH₃⁺) · c(OH⁻) / c(CH₃NH₂).
0.00044 = x² / (0.0875 M - x).
Solve quadratic equation: x = c(OH⁻) = 0.00598 M.
pOH = -log(0.00598 M) = 2.22.
pH = 14 - 2.22 = 11.78.
Answer:
I belive it is the range hope it helped! :)
Explanation:
Answer: Complete ionic equations dissociate all aqueous solutions into ions. Net ionic equations show the change that occurs in chemical reactions and do not show spectator ions that are the same in reactants and products. (b) If no spectator ions were present then complete and net ionic equations would be identical.
Explanation:
Answer: What is one source of thermal energy in the interior of the Earth?
Explanation:
