Question

10. What is chalatherate?

11. Explain how amphiphiles form micelles, membrane bilayers and vesicles.

12. Differentiate between ionization of water and water concentration.

13. Calculate the following molarity of solutions:

a) containing 72.9 grams of HCl in enough water to make 500 mL of solution?

b) containing 11.522 grams of KOH in enough water to make 350 mL of solution?

Answer 1

10) These are formed if a substance is capable of forming channels or cages which can take up another substance into the intra-space of the structure.The examples are urea, thiourea, aminos and zeolites chalatherate forming substance.

11) Amphiphilic molecules form micelles or bilayers
micelles- single long hydrocarbon chain
bilayers- two long hydrocarbon chains

Amphiphilic: hydrophobic amino acids inside the membrane, solvent exposed regions with polar amino acids.

12) ionization of water

When one water molecule transfers an H⁺ ion to a second water molecule forming an H₃O⁺ ion and OH^- ion (water is an acid and base in this reaction)

Water concentration.

1x10^-7 concentrations are both H₃O⁺ ions and OH^- ions found at in pure water at 25 degrees C.

13)