Answer:
5.7
Explanation:
(C₂H₅)₃NHCl dissociates according to the following equation.
(C₂H₅)₃NHCl ⇒ (C₂H₅)₃NH⁺ + Cl⁻
The molar ratio of (C₂H₅)₃NHCl to (C₂H₅)₃NH⁺ is 1:1. Then, the concentration of (C₂H₅)₃NH⁺ is Ca = 0.166 M.
(C₂H₅)₃NH⁺ is the conjugate acid of (C₂H₅)₃N. Given the Kb of (C₂H₅)₃N, we can calculate Ka for (C₂H₅)₃NH⁺ using the following expression.
Ka × Kb = Kw
Ka = Kw / Kb
Ka = 1.0 × 10⁻¹⁴ / 5.2 × 10⁻⁴
Ka = 1.9 × 10⁻¹¹
(C₂H₅)₃NH⁺ dissociates according to the following equation.
(C₂H₅)₃NH⁺ ⇄ (C₂H₅)₃N + H⁺
We can calculate [H⁺] using the following expression.
[H⁺] = √(Ca × Ka) = √(0.166 × 1.9 × 10⁻¹¹) = 1.8 × 10⁻⁶
The pH is:
pH = -log [H⁺] = -log 1.8 × 10⁻⁶ = 5.7
Answer:
C₄H₁₀O + 6O₂ ⇒ 4CO₂ + 5H₂O
Explanation:
Match the amount of reactants and products on both sides of the equation.
Answer:
The answer to your question is letter B
Explanation:
Incorrect name
A. acetic acid This name is correct for the acid with formula CH₃COOH
B. hydrocarbonate acid This is not the name for acid but for a molecule that has hydrogen and a metal.
C. hydrocyanic acid This name is correct for the inorganic molecule with formula HCN
D. sulfurous acid This name is correct and is the name of the inorganic molecule with formula H₂SO₃.
E. phosphoric acid This name is correct for the acid with formula H₃PO₄.
This is because of the increasing number of protons in the nucleus, resulting in a stronger attraction of the electrons with the nucleus.
Answer:
Insulators
Explanation:
Insulators consists of air, water etc.
