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CHEM210 Exam 1 QUESTIONS AND ANSWERS 2024

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CHEM-210 Exam 1 QUESTIONS AND ANSWERS 2024 solution solvent solute solubility entropy 3 steps of solution formation Delta H of solution heat of hydration saturated solution unsaturated solution supersaturated Henry's Law Molarity (M) Molality (m) Mole fraction (X) Mole percent vapo...

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  • March 5, 2024
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CHEM-210 Exam 1 QUESTIONS AND ANSWERS
2024

1). Solution

 Ans: A homogeneous mixture of two or more substances


2). Solvent

 Ans: majority component of a solution


3). Solute

 Ans: minority component of a solution


4). Solubility

 Ans: the amount of substance that will dissolve in another substance


5). Entropy

 Ans: measure of energy randomization/dispersion in a system


6). 3 steps of solution formation

 Ans: 1. Separation of solute particles (ENDO)
2. Separation of solvent particles (ENDO)
3. formation of solute - solvent interaction (EXO)


7). Delta h of solution

 Ans: delta H solute + delta H solvent + delta H mix


8). Heat of hydration




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,  Ans: the enthalpy change that occurs when 1 mol of the gaseous solute ions is
dissolved in water (EXO)
= delta H solvent + delts H mix


9). Saturated solution

 Ans: a solution that cannot dissolve any more solute under the given conditions


10). Unsaturated solution

 Ans: a solution that contains less dissolved solute than is possible at a given
temperature


11). Supersaturated

 Ans: a solution that holds more dissolved solute than is required to reach equilibrium at
a given temperature


12). Henry's law

 Ans: the solubility of a gas in a liquid (M) is directly proportional to the partial pressure
of that gas on the surface of the liquid multiplied by the constant of proportionality


13). Molarity (m)

 Ans: mol of solute/L of solution


14). Molality (m)

 Ans: mol solute/kg solvent


15). Mole fraction (x)

 Ans: mol of solute/mol of solution


16). Mole percent

 Ans: mole fraction x 100%



Vapor pressure


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