pls abswer

7. Acids, Bases, Buffers, and pH (35 points). Solution 2. Freezing polint depression y=mx+b;m= slope of cooling or freezing curve; b=y-intercept of freezing or cooling curve T= (Final temperature) - (Initial Temperature) AT1=K1mvelute Kr of water =1.86C/m K of stearic acid =4.5C/m mmalve= molality = moles of solute/kg of solvent molar mass of solute =g of solute /mol of solute 3. Acids, Bases, Buffers, and pH moles of acetic acid = moles of NaOH mass/volume percent ( $m/v)=( mass of vinegar in sample/volume of sample) 100 4. Determination of Ksp Moles of OH= moles of HCl(1 mole NaOH/1 mole of HCl) Molarity of [OH]=moles of OH/ volume of OH Molarity of [Ca2+]=[OH]/2 Ksp=[Ca2][OH2]2 Molar solubility in water =x solve for x from Ksp =[x][2x]2 Molar solubility in common ion =x solve for x from Ksp=[Ca2+][2x]2 5. Constant Pressure Calorimetry Density of water solution (or water) = mass / volume =1g/mL Specific Heat of water (C)=1cal/gC=4.18J/gC T= (Final temperature) (Initial Temperature) Mass of solution = mass of acid + mass of base q=( calories evolved or heat) ;q=mCT Calories / mole = number of calories / mole of acid qxn=mCT enthalpy of solution =H=qran/ moles of salt Specific Heat of metal =Cmetal=(mwaterCwaterTwater/mmetalTmatal)