K2SO4 is a neutral salt formed from a strong acid (H2SO4) and a strong base (KOH). Therefore, the pH of the solution is 7.

NH4Cl is an acidic salt, pH is approximately 5.1.

Using the formula for salt of weak acid, pH = 14 + 0.5(pKa + logC) = 14 + 0.5(4.74 + log(0.1)) = 9.25.

NaHCO3 is a weak base, pH ≈ 8.00 due to its bicarbonate ion acting as a weak base.

H2SO4 is a strong acid; it dissociates completely, so [H+] = 0.1 M; pH = -log(0.1) = 1.

Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]) = 4.74 + log(1) = 4.74.

At 25°C, the pH of a neutral solution is 7.

HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.

HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.

Na2CO3 is a salt of a weak acid (H2CO3) and a strong base (NaOH). The pH can be estimated using the hydrolysis of CO3^2- which gives a pH around 11.0.

Using the formula for weak acids, pH = 0.5(pKa - logC) = 0.5(4.00 - log(0.01)) = 5.00.

pH = -log[H+]. pH = -log(0.001) = 3.

pH = -log(0.00001) = 5.

pH = -log[H+] = -log(1 x 10^-7) = 7.

The pKa of acetic acid is approximately 4.76.

Most carboxylic acids have a pKa range of about 4-5.

Aniline has a pKb value around 9, indicating it is a weak base.

Methylamine is a weak base, so its pKb value is less than 7.

Gases have high compressibility due to the large spaces between particles, unlike solids and liquids which have definite shape and volume.

The primary component of natural gas is methane (CH4).

Phospholipids are the primary component of cell membranes, forming a bilayer.

Gases are highly compressible while liquids are not, due to the distance between particles in each state.

Solids have a fixed shape and volume due to closely packed particles, while liquids take the shape of their container but have a fixed volume.

The rate of adsorption increases with the surface area of the solid, as more surface provides more sites for gas molecules to adhere.

Proteins act as enzymes that catalyze biochemical reactions.

Proteins primarily function as enzymes that catalyze biochemical reactions.

Nitrogen makes up about 78% of the Earth's atmosphere, making it the primary gas.

Activated charcoal primarily adsorbs substances through physical adsorption due to its high surface area and porous structure.

Adsorption primarily involves physical attraction between the adsorbate and the surface of the adsorbent.

Adsorption of gases on solid surfaces primarily occurs due to Van der Waals forces, which are weak intermolecular forces that allow gas molecules to adhere to the surface.