Podcast Beta
Questions and Answers
What does Raoult's law state?
According to Henry's law, what is the relationship between the partial pressure of a gas and its mole fraction in a solution?
What is osmotic pressure?
What do colligative properties depend on?
Signup and view all the answers
What are isotonic solutions?
Signup and view all the answers
Define the elevation of boiling point in terms of colligative properties.
Signup and view all the answers
What is the half-life of a first-order reaction with a rate constant of $5.5 \times 10^{-14} s^{-1}$?
Signup and view all the answers
If a first-order reaction has a half-life of 10 minutes, what is its rate constant?
Signup and view all the answers
What is the mass of copper deposited at the cathode when a solution of CuSO4 is electrolyzed for 10 minutes with a current of 1.5 amperes?
Signup and view all the answers
In the electrolysis of CuSO4 solution, what is deposited at the cathode?
Signup and view all the answers
What is the standard Gibbs energy for the cell reaction Zn(s) + Cu2+(aq) -> Zn2+(aq) + Cu(s) given the standard EMF of the Daniel cell is 1.1V?
Signup and view all the answers
Which ore is correctly matched with its formula?
Signup and view all the answers
What does the Ebullioscopic constant represent?
Signup and view all the answers
What is the Cryoscopic constant a measure of?
Signup and view all the answers
In Raoult's law, what does the term 'X' usually represent?
Signup and view all the answers
What happens to the boiling point of a solution when a non-volatile solute is added?
Signup and view all the answers
How would an isotonic solution behave in terms of osmotic pressure compared to a hypertonic solution?
Signup and view all the answers
Which of the following best describes colligative properties of a solution?
Signup and view all the answers
Study Notes
Raoult's Law and Henry's Law
- Raoult's law states that the relative lowering of vapour pressure of a dilute solution containing a non-volatile solute is equal to the mole fraction of the solute.
- Henry's law states that the partial pressure of the gas in the vapour phase is directly proportional to the mole fraction of the gas in the solution, mathematically represented as p = KHx.
Osmotic Pressure and Isotonic Solutions
- Osmotic pressure is the extra pressure applied on a solution to prevent osmosis.
- Isotonic solutions have the same osmotic pressure at a given temperature, and a common example is blood being isotonic with saline (0.9% w/v of NaCl).
Colligative Properties
- Colligative properties are properties of dilute solutions that depend on the number of solute particles present in the solution, examples include relative lowering of vapour pressure, osmotic pressure, elevation of boiling point, and depression of freezing point.
Elevation of Boiling Point and Ebullioscopic Constant
- Elevation of boiling point (ΔT_b) is the difference in boiling points of a solution and a pure solvent, given by ΔT_b = T_s - T_0.
- Ebullioscopic constant (K_b) is the elevation in boiling point observed when one mole of a non-volatile solute is dissolved in 1 kg of solvent.
Cryoscopic Constant
- Cryoscopic constant (K_f) is the depression in freezing point observed when one mole of a non-volatile solute is dissolved in 1 kg of solvent.
Electrolysis and Faraday's Laws
- Electrolysis is the chemical decomposition of an electrolyte by an electric current.
- Faraday's first law of electrolysis states that the amount of substance deposited or liberated at the electrode is proportional to the quantity of current passing through the electrolyte.
- Faraday's second law of electrolysis states that when the same quantity of current is passed through different electrolytes, the amount of substances deposited at the electrodes is inversely proportional to their equivalent weights.
Galvanic Cell and Voltaic Cell
- A galvanic cell or voltaic cell is an electrochemical cell that generates an electric potential difference through spontaneous redox reactions.
Kinetics and Rate Constant
- The half-life of a first-order reaction is given by t_(1/2) = 0.693 / k.
- The rate constant (k) can be calculated from the half-life of a first-order reaction.
Electrochemistry and Cell Reactions
- The mass of copper deposited at the cathode during electrolysis can be calculated using the formula m = (I x t) / (96500 x n).
- The standard Gibbs energy for a cell reaction can be calculated using the formula ΔG = -nFE.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of Raoult's Law and Henry's Law in chemistry. Understand the concepts of Relative Lowering of Vapour Pressure and the relationship between partial pressure and mole fraction of a gas in a solution.
