ow does tem a it doesnt perature affecet the solubility of a

ow does tem a. it doesn\'t perature affecet the solubility of a substance? it increases the solubility c. it decreases the solubility d. d. it increases or decreases the solubility based on the substance being dissolved Calculate the vapor pressure of a solution made by dissolving 44.4 g of uren (molar mass 60.06 g/mol) in 85 g of water at 35°C. The vapr pressure of pure water at 35 isasmmil b. c. d. 36.47 mln Hg 62.14 mm Hg 0.864 mm Hg 39.77 mm Hg some other answer When added to water, which of the following solutions will have the highest freezing point (T)? ! 0.50 M KI . 0.30 M glucose a. ,I > C. d. 1.5 0.50 M (NH4),so, AP(C He) was found to be -3.1 x 10 atm\'s. For the following reaction, CsHu(g) C6H6(g) + 4H2(g) Determine t APCH22 for this reaction at the same time Y c. 1.24 x 102 atm/s 775 x 104 atm /s dt The reaction below was studied at 904 °C and the data from the table was collected 2NO (g) + 2H2 (g) N2 (g) + 2H20 (g) The following initial rates of reaction have been measured for the given reagent concentrations. Use the table on the next page for the questions 5-6

Solution

1.

Solubility:

When the maximum amount of solute is dissolve in the solvent is called solubility

Generally the solubility of salt will increases with temperature because as the temperature of solvent increases kinetic energy also increases. Thus the molecules of solvent are fast moving at higher temperature.

Fast moving molecules of solvent will dissolve more molecule of salt.

2.

moles urea = 44.4 / 60.06 = 0.739

moles water ( 85 g / 18.02 g/mol= 4.72

mole fraction water = 4.72/ 4.72 + 0.739 =0.865

p = 42.18 x 0.865= 36.47 mm Hg

3.

colligative properties follow the general relationship:

           

Here the constant is a characteristic of the particular property and solvent.

Thus the concentration of a solute in a solution influences its boiling point and freezing point. Due to higher concentration of solute in the solvent the boiling point will be increases means there is an elevation in the boiling point.

Similarly to higher concentration of solute in the solvent the freezing point will be decreases means there is a depression in the freezing point.

Thus the correct answer is 0.10 M Na3PO4 because it has lowest concentration of ions.

4.

  Rate of formation of H2 = 3.1 *10^-3 atm/s /4

= 7.75*10^-4 atm/s