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Q. Define-
i) Molal elevation constant.
ii) Molal Depression constant.
A solution is prepared by dissolving 11g glucose in 200 cm3 water at 300c. What is the mass percentage of glucose in solution ? The density of water at 300c is 0.996g /cm3?
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.
The vapour pressure of pure ether (molar mass 74 g/mol) at 293k is 588 m bar. A 10% (w/w) solutions of benzoic acid (molar mass=122 g/mol) was prepared in ether at 1293k. What will be the vapour pressure of solutions?
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?
What is the maximum value of vant Hoff factor for Na2SO4.10H2O?
the concentration of NO3 ions when equal volumes of 0.1 M AgNO3 and 0.1 M Nacl are mixed together is ?
R-COOH dimerises in benzene upto 50% and it ionises upto 10% in water.Detrmine the ratio of Van't hoff factors in dimerisation v/s ionisation?
what is the mole fraction of the solute in 2.5 m aqueous solution ??
A mixture of chlorobenzene and bromobenzene forms nearly ideal solution but a mixture of chloroform and acetone does not. Why?
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.
Liquid Y has higher vapour pressure than liquid X, which of them willhave higher boiling point?
why aquatic species are more comfortable in cold water than warm water?
0.5 mole of calcium carbonate is decomposed by an aqueous solution containing 25% HCl by mass. Calculatethe mass of the solution consumed.
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.
Two liquids A and B on mixing produce a warm solution. Which type of deviation from Raoult's law does it show?
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?
In 10 L water 1 mole of Ca(OH)2 is added with 1 mole of H2SO4.Determine van't hoff factor of final solution?
What is the significance of Henry's Law constant KH?
A 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?
why a person suffering from high blood pressure is advised to take minimum quantity of common salt?
Ozone can not oxidise =
and why and which and how ????/??///
What are the limitations of Henry's law?
What is the Van't Hoff Factor in K4[Fe(CN)6] and BaCl2 ? AND How it is calculated here ?
how is
m= w2/m2 // w1/1000
?
how did it come?
equivalent mass of H3PO4 for the given reaction
H3PO4 +Ca(OH)2 --> CaHPO4 + 2H2O
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).
Q.1 What happens if a patient is given hypertonic solution of glucose? (1 mark)
Q.4 Why the boiling point of a liquid get raised on dissolution of non volatile solute in it ? (1 mark)
Q.6 What will happen to the boiling point of the solution on mixing two miscible liquids showing negative deviation from Raoult 's law? (1 mark)
the density of a solution prepared by dissolving 120g of urea in 1000g of water is 1.15g/ml .The molarity of soltuion is:
1.78M
1.02 M
2.05 M
0.5 M
Addition of HgI2 to KI (aq.) shows decrease in vapour pressure. Why?
what is expected value of van,t Hoff factor for K3 [Fe(CN)6] in dilute solutions?
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)?
With the help of suitable diagram show that lowering of vapour pressure of a solution than the pure solvent, causes a depression of freezing point for the solution compared to that of pure solvent.
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
what is the n-factor for phosphoric acid?
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?
what is anoxia?
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 .
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 Formality and normality??
Calculate the molality of 1M solution of sodium nitrate. The Density of the solution is 1.25g/ml.
the mole fraction of water in a sulphuric acid solution is 085.calculate the molality of the solution
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?
why is cooking temperature in pressure cooker is higher than that of open pan???
For determining the molecular mass of polymers, osmotic pressure is preferred to other Colligative properties. Why????????
Draw a suitable diagram to express the relationship for ideal solution of A and B between vapor pressures and mole fractions of components at constant temperature.
Please reply to this question as soon as possible.It's very important for me!!!!!!.
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
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?
(iv) 1.0 M KNO3
find the molality of a water solution of binary electrolyte which freezes at 268.15k.(kf=1.85k kgmol.
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.
100g of the solution contains 5g of urea and 10g of glucose. What will be freezing point of the solution? (kf of water is 1.86 k kg/mol)
What is the molecular mass of cane sugar?
sodium chloride solution freezes at lower temperature than water but boils at higher temperature than water , explain.
Q.1 The values of Henry's law constant (KH) of N2 at temperatures 293 K , 298 K and 303 K are 74.48 kbar, 86.78 kbar and 88.84 kbar respectively.What inference can you draw from these information? (1 mark)
What is the van't Hoff factor for a compound which undergoes tetramerization in an organic solvent ?
0.15 gm of weak polybasic acid required 20 ml of.01M NaOH for complete neutralization.In a separate exp. 3.88 gm of sodium salt of this acid was dissolved in 100 gm of water and the solution was subjected to cryoscopic analysis ,frezzing pt. of the sol. was found to be -.93 degree celcius .Kf for water is 1.8.6 KKg/mole.deduce formula of salt and molar mass of acid?
An x molal solution of a compound in benzene has a molefraction =0.2.what is the value of x?
An aqueous solution of NaCl freezes below 273K. Explain the lowering in freezing point of water with the help of suitable diagram..
Why is vapour pressure of solution of glucose in water lower than water?
calculate the osmotic pressure at 25 degree celsius and freezing point of 1.8% aqueous solutionof glucose. Assume ideal behaviour of the solution. Take density to be 1 g/ml.
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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Syllabus
Q. Define-
i) Molal elevation constant.
ii) Molal Depression constant.
A solution is prepared by dissolving 11g glucose in 200 cm3 water at 300c. What is the mass percentage of glucose in solution ? The density of water at 300c is 0.996g /cm3?
what are the applications of Henry's law?
which is more concentrated 1 molar or 1 molal?
What is a decimolar solution?
Q.61. Number of ion of present in 250 ml of water of a solution having concentration 3 molal
(1) 6.023
(2) 4.5
(3) 9.03
(4) 12.046
A decimolar solution of potassium ferricyanide (K4[Fe(CN)6]) is 50% dissociated at 300k. calculate the osmotic pressure of solution.
The vapour pressure of pure ether (molar mass 74 g/mol) at 293k is 588 m bar. A 10% (w/w) solutions of benzoic acid (molar mass=122 g/mol) was prepared in ether at 1293k. What will be the vapour pressure of solutions?
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.
Q.59. When 6 gram of weak AB electrolyte having molecular with 60 is dissolved in the 180 g of water, the pressure of the solution was found to be 750 mm-Hg. The degree of dissociation of AB in the solution
(1) 0.625
(2) 0.315
(3) 0.25
(4) 0.50
what are the differences btw ideal and non ideal solns?
What is the maximum value of vant Hoff factor for Na2SO4.10H2O?
the concentration of NO3 ions when equal volumes of 0.1 M AgNO3 and 0.1 M Nacl are mixed together is ?
R-COOH dimerises in benzene upto 50% and it ionises upto 10% in water.Detrmine the ratio of Van't hoff factors in dimerisation v/s ionisation?
what is the mole fraction of the solute in 2.5 m aqueous solution ??
A mixture of chlorobenzene and bromobenzene forms nearly ideal solution but a mixture of chloroform and acetone does not. Why?
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.
Liquid Y has higher vapour pressure than liquid X, which of them willhave higher boiling point?
why aquatic species are more comfortable in cold water than warm water?
0.5 mole of calcium carbonate is decomposed by an aqueous solution containing 25% HCl by mass. Calculatethe mass of the solution consumed.
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.
Two liquids A and B on mixing produce a warm solution. Which type of deviation from Raoult's law does it show?
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.
1.partial pressure of benzene and toluene
2.total vapour pressure
Q- What is meant by semimolar and decimolar solutions?
38. A degree of dissociation of Al2(SO4)3 is 25% in a sclvent, then
(1) Normal boiling point = experimental boiling point
(2) Normal osmotic pressure = 2 x experimental osmotic pressure
(3) NormaI molecular weight = 2 x experimental molecular weight
(4) Normal freezing point = x experimental freezing point
In 10 L water 1 mole of Ca(OH)2 is added with 1 mole of H2SO4.Determine van't hoff factor of final solution?
What is the significance of Henry's Law constant KH?
39. 2 m aqueous solution of H2SO4 contains
(1) 49 g of H2SO4 per 250 g of solution
(2) 98 g of H2SO4 per 250 g of solvent
(3) 49 g of H2SO4 per 250 g of solvent
(4) 98 g of H2SO4 per 250 g of solution
A 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?
(i)0.5% NaCl solution (ii) 1% NaCl solution ? Explain.
why a person suffering from high blood pressure is advised to take minimum quantity of common salt?
Ozone can not oxidise =
and why and which and how ????/??///
What are the limitations of Henry's law?
What is the Van't Hoff Factor in K4[Fe(CN)6] and BaCl2 ? AND How it is calculated here ?
how is
m= w2/m2 // w1/1000
?
how did it come?
equivalent mass of H3PO4 for the given reaction
H3PO4 +Ca(OH)2 --> CaHPO4 + 2H2O
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).
Q.1 What happens if a patient is given hypertonic solution of glucose? (1 mark)
Q.4 Why the boiling point of a liquid get raised on dissolution of non volatile solute in it ? (1 mark)
Q.6 What will happen to the boiling point of the solution on mixing two miscible liquids showing negative deviation from Raoult 's law? (1 mark)
the density of a solution prepared by dissolving 120g of urea in 1000g of water is 1.15g/ml .The molarity of soltuion is:
1.78M
1.02 M
2.05 M
0.5 M
Addition of HgI2 to KI (aq.) shows decrease in vapour pressure. Why?
what is expected value of van,t Hoff factor for K3 [Fe(CN)6] in dilute solutions?
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)?
With the help of suitable diagram show that lowering of vapour pressure of a solution than the pure solvent, causes a depression of freezing point for the solution compared to that of pure solvent.
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
what is the n-factor for phosphoric acid?
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?
what is anoxia?
1)MOLe Fraction of NaOH
2)Molality of NaOH
3)Molarity of NaOH
Density of NaOH solution is 1.038g/cm3
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 .
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 ?
7. Raoult's law is not valid in.
(1) Non- ideal solution showing positive deviation.
(2) Non-ideal solution showing negative deviation.
(3) Mixture of two immiscible liquid.
(4) all of these
what is Formality and normality??
1) 0.1MHg2Cl2
2) 0.1MCa3(PO4) 2
3) 0.1M K4Fe (CN) 6
4) 0.1MAlCl3
Calculate the molality of 1M solution of sodium nitrate. The Density of the solution is 1.25g/ml.
the mole fraction of water in a sulphuric acid solution is 085.calculate the molality of the solution
Q89. When solution of Ni2+ (aq) and NH3(aq) combine following products are obtained
Ni2+ +2NH3 + 2H2O
Ni (OH)2 +6NH3
Compartment in which green and then deep blue colour will appear is
(1) Only I (2) Only II
(3) Both I and II ($) Neither I nor II
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?
2Give reasons for the following : (a) RBC swell up and finally burst when placed in 0.1% NaCl solution.
(b) When fruits and vegetables that have been dried are placed in water, they slowly swell and return to original form.
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?
why is cooking temperature in pressure cooker is higher than that of open pan???
For determining the molecular mass of polymers, osmotic pressure is preferred to other Colligative properties. Why????????
Is there any method to know which mixture shows negative or positive deviation ?
Draw a suitable diagram to express the relationship for ideal solution of A and B between vapor pressures and mole fractions of components at constant temperature.
Please reply to this question as soon as possible.It's very important for me!!!!!!.
(1) X
(2) X2
(3) X4
(4) X8
Kindly answer sir/mam.
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
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?
1) M/Kb
2) (4Kb A)/M
3) (Kb A)/M
4) KbM/4A
(iv) 1.0 M KNO3
find the molality of a water solution of binary electrolyte which freezes at 268.15k.(kf=1.85k kgmol.
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.
100g of the solution contains 5g of urea and 10g of glucose. What will be freezing point of the solution? (kf of water is 1.86 k kg/mol)
What is the molecular mass of cane sugar?
sodium chloride solution freezes at lower temperature than water but boils at higher temperature than water , explain.
Q.1 The values of Henry's law constant (KH) of N2 at temperatures 293 K , 298 K and 303 K are 74.48 kbar, 86.78 kbar and 88.84 kbar respectively.What inference can you draw from these information? (1 mark)
What is the van't Hoff factor for a compound which undergoes tetramerization in an organic solvent ?
0.15 gm of weak polybasic acid required 20 ml of.01M NaOH for complete neutralization.In a separate exp. 3.88 gm of sodium salt of this acid was dissolved in 100 gm of water and the solution was subjected to cryoscopic analysis ,frezzing pt. of the sol. was found to be -.93 degree celcius .Kf for water is 1.8.6 KKg/mole.deduce formula of salt and molar mass of acid?
An x molal solution of a compound in benzene has a molefraction =0.2.what is the value of x?
An aqueous solution of NaCl freezes below 273K. Explain the lowering in freezing point of water with the help of suitable diagram..
Why is vapour pressure of solution of glucose in water lower than water?
calculate the osmotic pressure at 25 degree celsius and freezing point of 1.8% aqueous solutionof glucose. Assume ideal behaviour of the solution. Take density to be 1 g/ml.
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