Explanation

Hydrogenation is the process of adding hydrogen (H₂) to a compound in the presence of a catalyst (like Ni, Pt, or Pd).

When cis-2-butene undergoes hydrogenation, it gets fully saturated, converting into butane (C₄H₁₀).

Explanation

Phenolphthalein is colorless in acidic and neutral solutions but turns pink in an alkaline medium.

This happens because, in a basic solution, phenolphthalein loses H⁺ ions, forming its negatively charged phenolate ion, which gives the pink color.

Explanation

Using the neutralization formula:
M₁V₁ = M₂V₂

Given:

• M₁ (HCl) = 0.50 M
• V₁ (HCl) = 10 mL
• M₂ (NaOH) = 0.25 M
• V₂ (NaOH) = ?

Now, solving:
(0.50 M) (10 mL) = (0.25 M) (V₂)
5 = 0.25V₂
V₂ = 20 mL

Explanation

Explanation

Explanation

Explanation

The unit of an equilibrium constant depends on the difference in the number of moles between products and reactants (Δn).

In this case, since there are 2 moles of reactants (H₂O) and 2 moles of products (H₃O⁺ + OH⁻), Δn is 0, resulting in no unit for the equilibrium constant. 

Explanation

Explanation

Explanation