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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?
An aqueous solution of NaCl freezes below 273K. Explain the lowering in freezing point of water with the help of suitable diagram..
A decimolar solution of potassium ferricyanide (K4[Fe(CN)6]) is 50% dissociated at 300k. calculate the osmotic pressure of solution.
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?
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?
Addition of HgI2 to KI (aq.) shows decrease in vapour pressure. Why?
the concentration of NO3 ions when equal volumes of 0.1 M AgNO3 and 0.1 M Nacl are mixed together is ?
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?
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.
0.5 mole of calcium carbonate is decomposed by an aqueous solution containing 25% HCl by mass. Calculatethe mass of the solution consumed.
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.
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?
What is the significance of Henry's Law constant KH?
what is the n-factor for phosphoric acid?
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?
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 are the limitations of Henry's law?
what is anoxia?
What is the Van't Hoff Factor in K4[Fe(CN)6] and BaCl2 ? AND How it is calculated here ?
A mixture of chlorobenzene and bromobenzene forms nearly ideal solution but a mixture of chloroform and acetone does not. Why?
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).
the density of a solution prepared by dissolving 120g of urea in 1000g of water is 1.15g/ml .The molarity of soltuion is:
If kf for water is 1.86 K kg mol1, what is the freezing point of 0.1 molal solution of a substance which undergoes no dissociation or association of solute?
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
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.
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?
why is cooking temperature in pressure cooker is higher than that of open pan???
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 .
A 6%(by weight) of non volatile solute isopentane at 300K has vapour pressure of 1426mm Hg. 20gm of isopentane is now added to the solution . The resulting solution has vapour pressure of 1445mm of Hg at same temperature.
Find molecular weight of solute and vapour pressure of isopentane at 300K.
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??
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)
Calculate the molality of 1M solution of sodium nitrate. The Density of the solution is 1.25g/ml.
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)
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?
What is the maximum value of vant Hoff factor for Na2SO4.10H2O?
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?
m= w2/m2 // w1/1000
how did it come?
For determining the molecular mass of polymers, osmotic pressure is preferred to other Colligative properties. Why????????
Liquid Y has higher vapour pressure than liquid X, which of them willhave higher boiling point?
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
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.
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?
An aqueous solution of sodium chloride freezes below 273K. Explain the lowering in freezing points of water with the help of a suitable diagram.
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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