A 33e1289 sample F an unknown metal is heated to 10001°C in e hot waterc bath untill thermar quilibrium is reachedo Tñe sümple quickly transfered to 5Auk water at 20 0€3°C calorimetero when themal eqilibrium is reachel, the the temperatire of the wlater is mearned-to be 2706°C what is mass Of this metal Specific heat Cafacity is 4.184 SJ/gramc container in a the estimated, molar
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- . Compatible Polymers A and B are to be blended to achieve a glass-transition temperatureof 60 oC. Tg’s of Polymers A and B are 30 and 85 oC, respectively, using an appropriateequation determine the composition of the blend.Hexanoic acid was added to an immiscible biphasic solvent sysem, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D1) of hexanoic acid in CCl4 with respect to water.One mole of a component A and twomoles of a component B are mixed at270C to form an ideal binary solution. calculate the Vmix , Gmix Hmix and Smix. Assume that R=8.314 JK1mol-1 ?
- One litre of a saturated aqueous solution of Ag2SO4 (MW = 311.79 g mol- 1) at 25 °C is evaporated to dryness. 4.844 g of Ag2SO4 residue was produced. What is the solubility product (Ksp)?Extintion coeficient for Y is 1280Find C where:Cp,w = specific heat of H2O(l) (4.184 J/g°C, aq solns assumes the specificheat of H2O(l))m = 100g of water
- A student determines the molar mass of a liquid unknown by the method used in thisexperiment. She found that the equilibrium temperature of a mixture of ice and water was1.0°C on her thermometer. When she added 12.3 g of her unknown sample to the mixture, thetemperature, after thorough stirring, fell to -4.0°C. She then poured off the solution through ascreen into a beaker. The mass of the solution was 93.4 g. Kf = 1.86°C/m What was the molality of the unknown solution? ______________ m How much unknown liquid was in the decanted solution? ______________ gHow much water was in the decanted solution? ______________ gWhat did she find to be the molar mass of the unknown liquid, assuming she made thecalculation properly?______________ gTable 2. Gibbs Free Energies of formation (kJ), ∆G°f, for Ions in 1M Solution and Ionic Solids Cations Cl--131.228 I--51.57 NO3--108.74 SO4-2-744.53 Ca2+-553.58 -748.1 -528.9 -743.07 -1797.28 W2 ∆G°f of water = -237.129 kJ/mol Calculated values of ∆G°rxn and the ∆Grxn of each box, Predicted results (ppt or no ppt).Observations (Rxn or No Rxn). S or support and R for Refute Cations Cl- I- NO3- SO4-2 Ca+2 helpHexanoic acid was added to an immiscible biphasic solvent system, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D2) of hexanoic acid in water with respect to CCl4.
- a) The following temperature composition data were obtained for a mixture of two liquids A and B at one atmosphere, where x is the mole fraction of A in the liquid and y is the mole fraction of A in the vapour, at equilibrium.t/ oC 125 130 135 140 145 150xA 0.91 0.65 0.45 0.30 0.18 0.098yA 0.99 0.91 0.77 0.61 0.45 0.25the boiling points are 124 oC for A and 155 oC for B. Plot the temperature-composition diagram for the mixture on a graph sheet. What is the composition of the vapour in the equilibrium with the liquid of composition i) xA = 0.50 and ii) xB= 0.33True of false? The Ksp value of PbSO4 will increase as the temperature of the solution increases?Describe the preparation of 750 mL of 5.30 M H3PO4 from the commercial reagent that is 86% H3PO4 (w/w) and has a specific gravity of 1.71. Take ? mL the concentrated reagent and dilute to ? mL with water.