EIT Chemistry 2

Question 1

What is the oxidation state of sulfur in H₂SO₄?

Accepted Answer

+6

Answer

With H at +1×2 and O at −2×4, sulfur must be +6 to balance the neutral molecule.

Question 2

Le Chatelier's principle states that when a stress is applied to a system at equilibrium, the system will:

Accepted Answer

Shift to oppose the stress

Answer

Le Chatelier's principle states the equilibrium shifts in the direction that counteracts the applied stress.

Question 3

The Henderson-Hasselbalch equation is primarily used to calculate:

Accepted Answer

pH of a buffer solution

Answer

pH = pKa + log([A⁻]/[HA]) is the Henderson-Hasselbalch equation for buffer pH.

Question 4

What is Avogadro's number?

Accepted Answer

6.022 × 10²³

Answer

Avogadro's number is 6.022 × 10²³ entities per mole of substance.

Question 5

Which type of chemical bond involves the sharing of electrons between two atoms?

Accepted Answer

Covalent bond

Answer

Covalent bonds form when atoms share electron pairs to achieve stable configurations.

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