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Write structure and molecular formula for the following compounds:
a. Orthophosphoric acid
b. Sulphurous acid
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Write the formula for pentaamminechlorocobalt (III) sulphate.
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In calculating osmotic pressure the concentration of solute is expressed in _______.
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A living cell contains a solution which is isotonic with 0.3 M sugar solution. What osmotic pressure develops when the cell is placed in 0.1 M KCl solution at body temperature?
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The osmotic pressure of blood is 7.65 atm at 310 K. An aqueous solution of glucose isotonic with blood has the percentage (by volume)________.
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Answer the following in one or two sentences.
What is osmotic pressure?
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A solution concentration is expressed in molarity and not in molality while considering osmotic pressure. Why?
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What are isotonic and hypertonic solutions?
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A solvent and its solution containing a nonvolatile solute are separated by a semipermeable membrane. Does the flow of solvent occur in both directions? Comment giving a reason.
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The osmotic pressure of CaCl2 and urea solutions of the same concentration at the same temperature are respectively 0.605 atm and 0.245 atm, calculate van’t Hoff factor for CaCl2.
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Explain reverse osmosis.
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How molar mass of a solute is determined by osmotic pressure measurement?
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An aqueous solution of a certain organic compound has a density of 1.063 g mL-1 , osmotic pressure of 12.16 atm at 25 °C and a freezing point of 1.03 °C. What is the molar mass of the compound?
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Which of the following reactions is exothermic?
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What is standard state of a substance?
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Answer in brief.
How will you calculate reaction enthalpy from data on bond enthalpies?
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What is the standard enthalpy of combustion? Give an example.
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The dissociation of H2S is suppressed in the presence of HCl. Name the phenomenon.
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Answer in brief.
How much heat is evolved when 12 g of CO reacts with NO2? The reaction is:
4CO(g) 2NO2(g) → 4CO2(g) + N2(g), ΔrH° = - 1200 kJ
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