Answer:
The concentration of H⁺ ions is 0.0165 M.
Explanation:
Let's consider the dissociation of H₂SO₄. In the first step, H₂SO₄ acts as a strong acid, completely dissociating into HSO₄⁻ and H⁺. Therefore, the concentrations of these ions will be the <em>same</em> that the initial concentration of the acid.
H₂SO₄ ⇒ HSO₄⁻ + H⁺
Initial 0.010M 0 0
Final 0 0.010M 0.010M
Now, HSO₄⁻ is a weak acid that will dissociate partially to form H⁺ and SO₄²⁻.
HSO₄⁻ ⇄ H⁺ + SO₄²⁻
To find out the concentration of H⁺ from HSO₄⁻ we will use an ICE Chart. We recognize 3 stages: Initial, Change and Equilibrium, and complete each row with the concentration or change in concentration.
HSO₄⁻ ⇄ H⁺ + SO₄²⁻
I 0.010 0 0
C -x +x +x
E 0.010 -x x x
This quadratic equation has 2 solutions: x₁ = -0.018 and x₂ = 0.00649. Since concentrations cannot be negative, we choose x₂. Then, [H⁺] coming from HSO₄⁻ is 0.00649 M.
The total concentration of H⁺ is:
[H⁺] = 0.010 M + 0.00649 M = 0.0165 M
Answer:
59.077 kJ/mol.
Explanation:
- From Arrhenius law: <em>K = Ae(-Ea/RT)</em>
where, K is the rate constant of the reaction.
A is the Arrhenius factor.
Ea is the activation energy.
R is the general gas constant.
T is the temperature.
- At different temperatures:
<em>ln(k₂/k₁) = Ea/R [(T₂-T₁)/(T₁T₂)]</em>
k₂ = 3k₁ , Ea = ??? J/mol, R = 8.314 J/mol.K, T₁ = 294.0 K, T₂ = 308.0 K.
ln(3k₁/k₁) = (Ea / 8.314 J/mol.K) [(308.0 K - 294.0 K) / (294.0 K x 308.0 K)]
∴ ln(3) = 1.859 x 10⁻⁵ Ea
∴ Ea = ln(3) / (1.859 x 10⁻⁵) = 59.077 kJ/mol.
the shifting of the earths plates
Answer:
fiber
Explanation:
Soluble fiber easily dissolves in water and is broken down into a gel-like substance in the part of the gut known as the colon. Insoluble fiber does not dissolve in water and is left intact as food moves through the gastrointestinal tract
i hope this is right and if not i tried my best to help
Rapid cell growth, or otherwise known as Cancer.