Answer:
CH₃COOH + NaOH → NaCH₃COO + H₂O
CH₃COO⁻ + H₂O ⇄ CH₃COOH + OH⁻ pKa = 4.75
Explanation:
Acetic acid and NaOH make a neutralization reaction, where a salt and water are formed.
CH₃COOH + NaOH → NaCH₃COO + H₂O
Acetic acid gives protons to medium
NaOH gives hydroxides to medium
When we have protons and hydroxides, we can produce water. That's why it is a neutralization reaction.
The acid is weak, so the formed CH₃COO⁻ becomes in the conjugate strong base. This anion can make hydrolysis to water.
CH₃COO⁻ + H₂O ⇄ CH₃COOH + OH⁻ pKa = 4.75
The NaOH is a strong base, so the Na⁺, as the conjugate weak acid, can't make hydrolysis.
We can't make this equilibrium.
Na⁺ + H₂O ⇄ NaOH + H⁺ IMPOSSIBLE
Answer:
E. O2
Explanation:
All substances has a simple molecular structure, where between their molecules are held by van der Waals' forces. But C must be incorrect because between the H2O2 molecules, they are mainly held by hydrogen bonds on top of van der Waals' forces. Hydrogen bonds are stronger than van der Waals' forces, so more energy is required to separate the H2O2 molecules.
In structures A and D, the molecules are polar. Their van der Waals' forces are stronger than Cl2H2 and O2, which are non-polar.
Between the Cl2H2 and O2, O2 has a smaller molecular size. The van der Waals' forces between the O2 molecules are hence the weakest. Least amount of energy is required to break the intermolecular forces between the O2 molecules therefore it has the lowest boiling point.
Answer:
<u>A. Magnet has a north pole and south pole.</u>
Explanation:
- A magnet has a north and south pole
- Magnets attract paper clips due to the metals present
- Magnetic fields are not visible
- North pole and south pole attract each other
Only the first statement is correct, the answer is (A).
Answer: I wanna say A but I’m not 100% sure
But I hope this helps at least a little :)
