1) Equlibrium reaction
CH3COOH (aq) = CH3COO(-) (aq) + H(+) (aq)
2) Equilibrium constant
Keq = Ka = [CH3COO-] [H+] / [CH3COOH]
3) Equilibrium concentrations
CH3COOH CH3COO- H+
start 1.40 0 0
react x 0 0
produced 0 x x
equilibrium 1.40 - x x x
=> Ka = x * x / (1.40 - x)
Approximation: given that Ka is very small x <<< 1,40 and 1.40 - x ≈ 1.40
=> Ka ≈ x^2 / 1.40
=> x^2 ≈ 1.40Ka = 1.40 * 1.8 * 10^ - 5 = 2.52 * 10^-5
=> x ≈ √(2.52 * 10^-5) ≈ 5.02 * 10^ -3 M
4) pH = log 1 / [H+]
[H+] = x = 5.02 * 10^-3M
=> pH ≈ log (1 / 5.02 * 10^-3) ≈ 2.3
Answer: 2.3
Answer:
false
Explanation:
when an object sinks, that means they are denser than water
when they float, they are less dense than the density of water
Answer:
10000000000
Explanation:
1 + 1 = 2 and if you divide 2 by 2 the answer is 1 and 1 x 100 = 100
and if you add 8 zeros to 100 the answer is 10000000000
#KeepOnLearning
Answer:
B.
General Formulas and Concepts:
<u>Chemistry - Organic</u>
- Hydrocarbons
- Bond-Line Notation: Each "arrow" point represents a carbon and the lines represent a bond between the carbons. Hydrogens are assumed added when drawing the molecular formulas
Explanation:
We are given C₈H₁₈. We need a Bond-Line notation where there are 8 "arrow" points (which represent Carbon). We can disregard the Hydrogens as they are assumed to take the rest of the bonds.
Only option B has a value of 8 carbons, represented by the "arrow" points. Therefore, it is the correct answer.
Answer:
<h3>The answer is 0.4 moles</h3>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>0.4 moles</h3>
Hope this helps you
