Oceans
- Created by: Kate Prescott
- Created on: 06-05-13 12:00
Other questions in this quiz
2. What is the formula and charge of the nitrate (V) ion?
- NO(2-)
- NO3-
- N2O
- NO5-
3. What makes a solute soluble in a solvent?
- Solute is small
- The energy released in forming new intermolecular bonds between solute and solvent molecules is greater than the energy required to break the pre-existing intermolecular bonds between solute or solvent molecules.
- Strong intramolecular bonds formed between solute and solvent molecules
- Solute has to be an ion
4. Which of the following is NOT true of a buffer solution?
- Unlimited quantities of an acid or alkali can be added without the pH of the solution changing
- Made of a weak acid and one of it's salts or a weak base and one of it's salts
- When an acid is added, [H+] increases and so the position of equilibrium moves to the right to counteract this change, thus reducing [H+] to its original level
- When an alkali is added, it reacts with H+ ions and so [H+] is reduced, so the position of equilibrium moves to the right to counteract this change and so [H+] returns to its original level
- There is an excess of [HA] and [A-] in the buffer solution, which act as sinks for added H+ or OH- ions
5. Which of the following DOES NOT correspond to an increase in the entropy of a system?
- A decrease in the concentration of a system
- A change in state from a liquid to a gas
- An increased number of particles
- An increase in the size or complexity of molecules
- A change in state from a liquid to a solid
- An increase in the temperature
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