CHEM 1332 1st Edition Lecture 6 Outline of Last Lecture - Osmotic pressure- Endothermic and Exothermic outcomes- SolubilityOutline of Current Lecture - Different types of solubility - Temperature effects of solubility- Henry’s Law- Concentration effects on rate of reactionCurrent Lecture- Solubility is the amount of solute that can be dissolved in a given amount of solvent or solution to give a saturated solution- Molar solubility is the mole of solute over liters of solution- Gram solubility is the gram solute over liters of solution- Another method is gram solute over 100 mL of solution- Temperature can affect solubility - An increase in temperature leads to an increase in solubility if the change in heat of the solution is endothermic- An increase in temperature leads to a decrease in solubility if the change in heat of the solution is exothermic- A decrease in temperature leads to a decrease in solubility if the change in heat of the solution is endothermic - A decrease in temperature leads to an increase in solubility if the change in heat of the solution is exothermic- The reason is that in an endothermic reaction it wants heat and an exothermic reaction does not want heat- Pressure affects solubility as well and we can check this through henry’s law that is solubility of gas is equal to henry’s constant times the pressure of the gas- Henry’s constant varies and is based on the gas or material- Rate of a reaction is change of concentration over the change in time- Concentration affects the rate of reaction - In general a rate of reaction increases as concentration of the reaction increases- The rate law is rate= k ×reaction1xreaction 2yThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- k is a constant that depends on reaction and the temperature- The x and y in the equation is the order of the reaction- An example is rate= k A2B 2nd order in A 1st order in B overall it is to the 3rd order- If we were to double B we would double the rate- If we were to triple A we would notuple the rate or times to ninthKey TermsConcentration- the amount of substance per defined
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