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i) Molal elevation constant.
ii) Molal Depression constant.
what are the applications of Henry's law?
which is more concentrated 1 molar or 1 molal?
What is a decimolar solution?
A decimolar solution of potassium ferricyanide (K4[Fe(CN)6]) is 50% dissociated at 300k. calculate the osmotic pressure of solution.
Resistance of a conductivity cell filled with 0.1 M is 100 ohm. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohms, calculate the conductivity and molar conductivity of the 0.02 M KCl solution. Conductivity of 0.1 M KCl solution is 1.29*10-2 S cm-1.
what are the differences btw ideal and non ideal solns?
the concentration of NO3 ions when equal volumes of 0.1 M AgNO3 and 0.1 M Nacl are mixed together is ?
what is the mole fraction of the solute in 2.5 m aqueous solution ??
vapour pressure of chloroform and dichloromethane at 298 k are 200mm of hg and 415mm of hg respectively.
1)calculate the vapour pressure of solution prepared by mixing 25.5 g of chloroform and 40g of dichloromethane at 298K.
2)mole fraction of each component in vapour phase.
why aquatic species are more comfortable in cold water than warm water?
If N2 gas is bubbled through water at 293 K, how many millimoles of N2 gas would dissolve in 1 litre of water. Assume that N2 exerts a partial pressure of 0.987 bar. Given that Henrys law constant for N2 at 293 K is 76.48 kbar.
After removing outer shell of two eggs in dilute HCl one egg is placed in distilled water and other is placed in saturated NaCl . what are observations and why?
1. NaCl or CaCl2 is used to clear snow from roads. why
2. what is an antifreeze?
3. what is de icing agent?
4. what is vant hoff factor for a factor which undergoes tetramerisation in an organic compound.
Q- What is meant by semimolar and decimolar solutions?
What is the significance of Henry's Law constant KH?
solution of glucose in water is labelled as 10% w/w, what would be
the molality and mole fraction of each component in the solution? If
the density of solution is 1.2 g mL−1,
then what shall be the molarity of the solution?
What are the limitations of Henry's law?
why a person suffering from high blood pressure is advised to take minimum quantity of common salt?
What is the Van't Hoff Factor in K4[Fe(CN)6] and BaCl2 ? AND How it is calculated here ?
what is the advantage of using osmotic pressure as compared to other colligative properties for the determination of molar masses of solutes in solutions?
equivalent mass of H3PO4 for the given reaction
H3PO4 +Ca(OH)2 --> CaHPO4 + 2H2O
At 300K temperature Beaker A containing 0.02M solution of urea and Beaker B containing 0.002M solution of sugar are seperated by SPM with respect to water . On which Beaker how much pressure should be applied to prevent osmosis?
R=0.082 L atm mole-1K-1
A: 0.4428 atm on Beaker B
B: 0.4920 atm on beaker A
Calculate the osmotic pressure of a solution obtained by mixing 100cm3 of 1.5% solution of urea (molar mass =60) and 100cm3 of 3.42 % solution of cane sugar (molar mass=342) at 20oC (R=0.082litre atm/degree/mol).
the density of a solution prepared by dissolving 120g of urea in 1000g of water is 1.15g/ml .The molarity of soltuion is:
what is expected value of van,t Hoff factor for K3 [Fe(CN)6] in dilute solutions?
Why is it not possible to obtain pure ethanol by fractional distillation? What
calculate the amount of KCL which must be added to 1Kg of water so that the freezing point is depressed by 2K.(Kf for water =1.86 K Kg/mol)?
Two liquids A and B boil at 145 C and 190 C respectively.Which of them has higher vapour pressure at 80 C.Give reason..-
Pre board question
Plz help.What will be the answer
The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78 g mol -1). Vapour pressure of the solution, then, is 0.845 bar. What is the molar mass of the solid substance?
a 2g of benzoic acid dissolve in 25g of benzene shows a depression in freezing point of 1.62 k.
molal depression constant for benzene is 4.9 KKg/mol. what is the % of association of acid.
if it forms a dimer in soln .
4% solution of a non volatile solute is isotonic with 0.702% urea solution. If molar mass of urea is 60.What is the molar mass of the non volatile solute.
Henry Law Constant For CO2 In Water Is 1.67x108 Pa At 298 K.Calculate The Quantity Of CO2 In 500 ml Of Soda Water When Packed Under 2.5 atm CO2 Pressure At 298 K ?
what is the n-factor for phosphoric acid?
what is Formality and normality??
What happens when blood cells are placed in pure water?
the mole fraction of water in a sulphuric acid solution is 085.calculate the molality of the solution
Calculate the molality of 1M solution of sodium nitrate. The Density of the solution is 1.25g/ml.
State the condition resulting in reverse osmosis?
if 0.5 mol of BaCl2 is mixed with 0.2 mol of Na3PO4.How many maximum moles of Ba3(PO4)2 can be formed?
The partial pressure of ethane over a solution containing 6.56 × 10−3 g of ethane is 1 bar. If the solution contains 5.00 × 10−2 g of ethane, then what shall be the partial pressure of the gas?
For determining the molecular mass of polymers, osmotic pressure is preferred to other Colligative properties. Why????????
what happens when NaCl is added to aqueous solution of glucose??
0.7g of a sample of Na2CO3.xH2O were dissoled in water and the volume made up to 100ml . 20ml of this solution
required 19.8ml of 0.1 N HCl for complete neutralization . Find the value of x .
ans = ~2
Name the SPMwhich can be used in reverse osmosis??
why is freezing point depression of 0.1 M NaCl solution nearly twice that of 0.1 M glucose solution?
How to calculate equivalent weight?
FeCl3 on reaction with potassium ferrocyanide in aqueous solution gives blue colour.When 0.01M of FeCl3 and 0.1M potassium ferrocyanide are placed in a beaker and seperated by a semi permeable membrane, identify whether there will be an appearance of blue colour on potassium ferrocyanide side due to osmosis.E xplain your answer.
(iv) 1.0 M KNO3
What is the molecular mass of cane sugar?
what is the ratio of solubilities of N2 and O2 in H2O at 373K? given that KH(N2) = 12.6 X 104 atm and KH(O2) = 7.01 X 104 atm. assume that P(N2) = 0.8 atm and P(O2) = 0.2 atm.
sodium chloride solution freezes at lower temperature than water but boils at higher temperature than water , explain.
A 0.2% aqueous solution of a non-volatile solufe exerts a vapour pressure of
What is the van't Hoff factor for a compound which undergoes tetramerization in an organic solvent ?
An x molal solution of a compound in benzene has a molefraction =0.2.what is the value of x?
Two liquids A and B on mixing produce a warm solution. Which type of deviation from Raoult's law does it show?
Why is vapour pressure of solution of glucose in water lower than water?
A solution containing 30g of non-volatile solute exactly in 90g of water has a vapour pressure of 2.8 kpa at 298 k. further, 18g of water is then added to the solution & the new vapour pressure becomes 2.9 kpa at 298 k. Calculate.a. Molar mass of the solute b. Vapour pressure of water at 298k
A solution containing 30g of non-volatile solute exactly in 90g of water has a vapour pressure of 2.8 kpa at 298 k. further, 18g of water is then added to the solution & the new vapour pressure becomes 2.9 kpa at 298 k. Calculate.
a. Molar mass of the solute b. Vapour pressure of water at 298k
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