Answer:
a) [H₃O⁺] = 1.8x10⁻⁵ M
b) pH = 4.75
c) % rxn = 3.5x10⁻³ %
Explanation:
a) The dissociation reaction of HCN is:
HCN(aq) + H₂O(l) ⇄ H₃O⁺(aq) + CN⁻(aq)
0.5 M - x x x
The dissociation constant from the above reactions is given by:
By solving the above quadratic equation we have:
x = 1.75x10⁻⁵ M = 1.8x10⁻⁵ M = [H₃O⁺] = [CN⁻]
Hence, the [H₃O⁺] is 1.8x10⁻⁵ M.
b) The pH is equal to:
Then, the pH of the HCN solution is 4.75.
c) The % reaction is the % ionization:
Therefore, the % reaction or % ionization is 3.5x10⁻³ %.
I hope it helps you!
According to Graham's law of effusion, the ratio of the rates of effusion of two different molecules is equal to the square root of the reciprocal of the molar masses of the molecules. gas a is faster than B since it is lighter than B. Hence we expect a molar mass less than 17. we have the equation 1/0.68 =
where x is the molar mass of gas A. This is equal to 7.86 grams.
CaCl₂ (aq) + K₂CO₃ (aq) → CaCO₃ (s) + 2 KCl (aq)
where:
(aq) - aqueous
(s) - solid
Explanation:
Calcium chloride (CaCl₂) will react with potassium carbonate (K₂CO₃) to produce solid calcium carbonate (CaCO₃) and potassium chloride (KCl).
Learn more about:
precipitation reaction
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Answer:
36.7 M
Explanation:
You have to divide moles with liters.
Hi there!
All gasses and engines need fuel to burn because the heat or chemical reaction from the burning fuels are converted into different types of energy that fuel (or help fuel) the engine or gas.
Hope this helps!