Answer:
Equilibrium concentration of Br₂ = 0.02 M
Explanation:
Moles of hydrogen gas :
Given, Mass of H₂ = 1.374 g
Molar mass of H₂ = 2.016 g/mol
The formula for the calculation of moles is shown below:
Thus,
Moles of Bromine gas :
Given, Mass of Br₂ = 70.31 g
Molar mass of Br₂ = 159.808 g/mol
The formula for the calculation of moles is shown below:
Thus,
Considering the ICE table for the equilibrium as:
H₂(g) + Br₂(g) ⇌ 2HBr(g)
t = o 0.68 0.44 0
t = eq -x -x +2x
---------------------------------------------
-----------------------------
Moles at eq: 0.68-x 0.44-x 2x
Given that: At equilibrium the vessel is found to contain 0.566 g of H₂
Moles = 0.566 g / 2.016 g/mol = 0.28 moles
Thus, 0.68 - x = 0.28
x = 0.40 moles
Volume = 2.00 L
Equilibrium moles of Br₂ = 0.44 - 0.40 moles = 0.04 moles
<u>Equilibrium concentration of Br₂ = 0.04 moles/ 2 L = 0.02 M</u>
The areas tilted toward the sun get more daylight hours and higher temps
Temperature is the measure of average kinetic energy of the particles in a substance
You need to use the Ka for the acetic acid and the equilibrium equation.
Ka = 1.85 * 10^ -5
Equilibrium reaction: CH3COOH (aq) ---> CH3COO(-) + H(+)
Ka = [CH3COO-][H+] / [CH3COOH]
Molar concentrations at equilibrium
CH3COOH CH3COO- H+
0.50 - x x x
Ka = x*x / (0.50 - x) = x^2 / (0.50 - x)
Given that Ka is << 1 => 0.50 >> x and 0.50 - x ≈ 0.50
=> Ka ≈ x^2 / 0.50
=> x^2 ≈ 0.50 * Ka = 0.50 * 1.85 * 10^ -5 = 0.925 * 10^ - 5 = 9.25 * 10 ^ - 6
=> x = √ [9.25 * 10^ -6] = 3.04 * 10^ -3 ≈ 0.0030
pH = - log [H+] = - log (x) = - log (0.0030) = 2.5
Answer: 2.5
A chemical property of soda ash is that it is an alkaline compound , of pH 11.6 in aqueous solution. The chemical name of soda ash is sodium carbonate. It is a sodium salt of carbonic acid and occurs as a white crystalline compound. It has a cooling alkaline taste. It can be found in the ashes of many plants. It is produced in large quantities from sodium chloride (common salt). It can be found as a mineral in mineral deposits of natron usually in seasonal lakes when the lakes dry up.
