Solutions Questions and Answers

The colligative properties of solutions a depend on nature of solute particles b do not depend on number of solute particles c do not depend on dissociation of solute in solvent d depend on number of solute particles

55 Consider a reaction aG bH products When concentration of both the reactants G and H is doubled the rate increases by eight times However when concentration of G is doubled keeping the concentration of H fixed the rate is doubled The overall order of the reaction is 4 3 1 0 2 1 3 2

FH 7 nh xuldfria alciss1 faq du 1 100 ml 0 1 M AgNO3 100 ml 0 1 M KI 3 100 ml 0 1 M AgNO3 100 ml 0 2 M KI 2 100 ml 0 2 M AgNO 100 ml 0 1 M KI 3 4 100 ml 0 2 M AgNO3 200 ml 0 1 M KI

4 3 i If you are given a 2M NaOH solution having density 1 g mL then find the molality of solutio ii Find the molarity of 5m molal NaOH solution having density 1 5 g ml iii Find the mole fraction of solute in problem i

6 0 g of urea molecular weight 60 was dissolved in 9 9 moles of water If the vapour pressure of pure water is Po the vapour pressure of solution is 1 0 10 P 2 1 10 Po

200 If vapour pressure of the two volatile liquids are given below The mole fractions of the components in the idial solutions are also provided Then which one will be most easily separated by fractional distillation A PA 100 mm XA 0 5 B C P 50 mm XA 0 9 0 PR 90 mm XB 0 5 PR 55 mm XB 0 1 D P 1000 mm XA 0 4 PA 200 mm X 0 7 A p 100 mm P XB 0 6 P 201 mm XB 0 3

3 acetophenone and hexanal 4 glucose and fructose A 0 004M solution of Na2SO4 is isotonic with a 0 010 M solution of glucose at same temperatur The apparent degree of dissociation of Na2SO is 1 25 2 50 3 75 In the compound given below 4 85

Chemical Equilibrium 0 Vapour density of equilibrium PCls g A increasing temperature C increasing pressure PC13 g Cl g is decreased by B decreasing pressure D decreasing temperature N

Molar volume of liquid A d 0 8gm ml increase by factor of 2000 when it vapourises at 200K Vapour pressure of liquid A at 200K is R 0 08 L atm mol K Molar mass of A 80g mol A 0 4 atm B 8 atm C 0 8 atm D 0 08 atm

When 20g of Naphthoic acid C H O is dissolved in 50g of benzene K 1 72 K kgmol freezing point depression of 2K is observed The Van t Hoff factor i is 3 0 5 4 2 1 I In the following reaction 2 3

4 6 H PO4 is a tribasic acid and one of its salt is NaH PO What volume of 1M NaOH solution should be added to 12 g NaH PO to convert it into Na PO at wt of P 31 1 100 mL 2 200 mL 3 80 mL 4 300 mL

For an ideal liquid liquid solution of A P option s A always less than Y X A YA C XA XB YB XB 25 torr B P 50 torr select the correct B D YA X A YB X always more than YB XB may be greater smaller or equal to YA XB

Given below are few mixtures formed by mixing two components Which of the following binary mixtures will have same composition in liquid and vapour phase i Ethanol Chloroform ii Nitric acid Water iii Benzene Toluene iv Ethyl chloride Ethyl bromide Choose only 1 answer A B i and iii i and ii th fak FULLY

The mole fraction of urea in an aqueous urea solution containing 900 g of water is 0 05 If the density of the solution is 1 2 g cm3 the molarity of urea solution is JEE 2019 Given data Molar masses of urea and water are 60 g mol and 18 g mol respectively

3 At 323 K the vapour pressure in millimeters of mercury of a methanol ethanol solution is represented by the equation p 120 XA 140 where XA is the mole fraction of methanol Then the value of is PA lim XA1 XA A 250 mm B 140 mm 800 C 260 mm D 20 mm sture having a n met beiling

S rhombic O2 g SO g AH 307 5kJ S monoclinic O g SO g AH SO g AH 310kJ The data can predict that Rhombic sulphur is yellow in colour BAHtransition of SR to SM is exothermic CAHtransition of SR to SM is endothermic D Monoclinic sulphur is more stable

75 g ethylene glycol is dissolved in 500 gram water The solution is placed in a refrigerator maintaine at a temperature of 263 7 K What amount of ice will separate out at this temperature K water 1 86 K molality 1 300 g 3 178 g 2 200 g 4 258 g

28 Which of the following increasing order of pH of 0 1 M solution of the compound HCOONH W A W B B CH COONH 1 A 3 A CH COONa NH Cl is correct SAMB SAW B W AS B B harts B 2 DA V B MCDONAZ 4000 und New Delhi 110005 Ph 011 47623456

The equilibrium constant for the reaction CO g H O g CO g H g is 3 at 500 K In a 2 litre vessel 60 gm of water gas equimolar mixture of CO g and H g and 90 gm of steam is initially taken What is the equilibrium concentration of H g at equilibrium mole L A 1 75 B 3 5 C 1 5 D 0 75 Xpe 75xpand to the

20 HC H5O and C H O 5 points What is the pH of a 1 00x 10 molar solution of LICI Report your answer with 2 places past the decimal point Type your answer

1 A compound has a mass of 45 632 grams was added to 500 0 ml of water with an initial temperature of 26 7 C After thorough mixing the temperature decreases to 24 1 C How many calories were transferred Is this an exothermic or endothermic process Heat mass solution AT 100 of Sofition

What is the predicted van t Hoff factor for AlCl3 O a 1 Ob 2 O c 3 O d 4 O e 5

Which of the following aqueous solutions will have the lowest boiling point 2 5 m FeCl3 3 0 m K SO4 6 5 m glucose 4 0 m LIQH 2 0 m Li3PO4

Determine the osmotic pressure of a solution that contains 0 040 g of a hydrocarbon solute molar mass 340 g mol dissolved in benzene to make a 350 mL solution The temperature is 20 0 C 0 42 torr 2 1 torr 2 7 torr 6 1 torr 5 7 torr

The hardness of water is usually expressed in parts per million ppm by mass of CaCO What Type numbers in the boxes is the hardness of a water sample with a Ca ion concentration of 2 3 103 M Assume the 10 points density of the water is 1 0 g mL ppm

Determine the change in boiling point for 274 2 g of carbon disulfide Kb 2 34 C kg mol if 35 0 g of a nonvolatile nonionizing compound is dissolved in it The molar mass of the compound is 70 0 g mol and the boiling point of the pure carbon disulfide is 46 2 C 0 299 C 1 28 C 8 53 C 36 0 C 4 27 C

The vapor pressure of pure methanol CH3OH at 40 C is 97 7 torr What is the vapor pressure in torr of a solution containing 47 6 g of nonvolatile nonelectrolyte glycerol C3H8O3 in 97 1 g of methanol at 40 C Report your answer to 1 decimal place Your Answer

A solute added to a solvent raises the boiling point of the solution because The temperature to cause boiling must be great enough to boil not only the solvent but also the solute The solute particles lower the solvent s vapor pressure thus requiring a higher temperature to cause boiling The solute particles raise the solvent s vapor pressure thus requiring a higher temperature to cause boiling O The solute increases the volume of the solution and an increase in volume requires an increase in the temperature to reach the boiling point derived from PV nRT Two of the above are correct

Adding salt to water decreases the freezing point of the water since it lowers the vapor pressure of the ice True False

An ideal solution is formed from a mixture of the nonvolatile solute urea CO NH2 2 and methanol CH3OH The vapor pressure of pure methanol at 20 C is 89 mmHg If 4 6 g of urea is mixed with 44 0 g of methanol calculate the vapor pressure of the methanol solution 4 7 mmHg 81 mmHg 74 mmHg 15 mmHg 84 mmHg

Type numbers in the boxes 10 points In the US alcohol proof is equal to twice the percent of alcohol ethanol by volume so for example 190 proof alcohol is a 95 ethanol solution by volume What is the proof of a 375 ml bottle of tequila that contains 3 26 moles of ethanol C H OH which has a density of 0 785 g mL proof

A solution is made by adding 0 100 mole of ethyl ether to 0 420 mole of ethyl alcohol If the vapor pressure of ethyl ether and ethyl alcohol at 20 C are 375 torr and 20 0 torr respectively the vapor pressure of the solution at 20 C assuming ideal behavior is 88 3 torr 307 torr 56 0 torr 395 torr none of these

A solution is prepared by mixing 50 8 mL of 1 propanol C3H O d 0 803 g mL with 118 80 mL of water d 0 998 g mL Calculate the mole fraction of the 1 propanol assume the volumes add on mixing Report your answer with 3 decimal places Your Answer mol

The osmotic pressure of a 4 50 mL solution containing 0 181 g of protein dissolved in water is determined to be 15 10 torr at 22 C What is the molar mass of the protein Report your answer to the nearest whole number hint proteins have very large molar masses Your Answer

A particular liquor is 21 5 ethanol CH3CH OH by volume Calculate the concentration of ethanol in molality The density of ethanol is 0 789 g mL the density of water is 0 998 g mL assume the volumes are additive Your Answer

Assuming ideal solution behavior what is the boiling point of a solution of NaCl in water if the solution freezes at 0 93 C For water T 100 00 C kb 0 512 Cm and T 0 00 C and k 1 86 Cm 100 52 C 100 13 C 100 78 C O 100 26 C

The boiling point of a solution containing 4 90 g of a nonvolatile hydrocarbon in 102 2 g of acetone is 56 44 C What is the molecular weight of the hydrocarbon For acetone T 55 95 C and K 1 71 C m Report your answer to 1 decimal place Your Answer

Click here to open the equation sheet in a separate window CHEM1212 Equations Sheet Important Constants R 8 314 J K mol R 0 08206 L atm mol K F 96 500 C mol NA 6 023x1023 mol 1 RH 2 18x10 18 J Kw 1 00 10 14 25 C For water Sice 2 09 J g C AHfus 6 01 kJ mol Question 6 1 point 4 Listen 250 210 Assuming ideal solution behavior what is the molar mass g mol of a nonelectrolyte compound if a solution of 5 00 g of the compound in 25 00 g of carbon tetrachloride boils at 81 5 C at 1 atm For carbon tetrachloride Tb 76 8 C k 5 02 C m 130 AHvap 85 Swater 4 18 J g C 40 67 kJ mol 5steam 1 84 J g C

S points At 26 9 C the vapor pressure of npropyl mercaptan CaHySH is 182 torr while that of acetonitrile CH3CN is 112 torr What is the vapor pressure at 26 9 C of a solution made by mixing 78 7 g of CHSH and 92 6 g CH3CN if Raoult s Law is obeyed Do not report units in your answer Report your answer with one decimal place past the decimal point Type your answer

A chemist prepares a solution of iron III bromide FeBr3 by measuring out 28 9 mg of FeBr3 into a 50 mL volumetric flask and filling to the mark with distilled water Calculate the molarity of Br anions in the chemist s solution Be sure your answer is rounded to 2 significant digits mol x10

Bromine monochloride is synthesized using the reaction Br g Cl g 2 BrCl g K 1 1 x 104 at 150 K A 190 0 L flask initially contains 0 961 kg of Br and 1 125 kg of Cl Calculate the mass of BrCl in grams that is present in the reaction mixture at equilibrium Assume ideal gas behavior mass of BrCl What is the percent yield of BrCl percent yield

You have 30 ounces of a 30 acid solution How many ounces of a 15 acid solution must you add to make a new solution that is 25 acid Only provide the numerical solution Round to the nearest tenth No units are necessary

What mass in grams of NaCl would need to be added to 2051 g of water to increase the boiling temperature of the solution by 1 500 C Kb for water is 0 5100 C m

A solution of oxalic acid dihydrate H C2O4 2H O with a known concentration of 0 400 M H C O4 2H O is titrated with a 0 333 M NaOH solution How many L NaOH are required to reach the second equivalence point with a starting volume of 65 0 mL H C O4 2H O according to the following balanced chemical equation ADD FACTOR H C O4 2H O 2 NaOH Na C O4 4 H O ANSWER RESET G

optional Mercury chloride is a fungicide If the molar mass of the fungicide is 470 g mol and the percent composition is 85 0 Hg and 15 0 Cl what is the empirical formula and molecular formula of the compound star mummodo to sle aprtol lashilg Empirical formula Molecular formula

The boiling point of butane at 1 atm pressure is 1 0 C and its AHvap is 22 44 kJ mol What is the pressure in atm of the butane in the lighter at 25 0 C

The mass of a 25 6 cm 3 sample of Magnesium

INTERACTIVE EXAMPLE Calculating the Vapor Pressure of a Solution Containing Two Liquids Pentane C5H12 molar mass 72 146 g mol and hexane C6H14 molar mass 86 172 g mol form an ideal solution At 25 C the vapor pressure of pentane ar hexane are 511 and 150 torr respectively A solution is prepared by mixing 10 1 g pentane with 36 7 g hexane What is the vapor pressure of the resulting solut WHERE ARE WE GOING What information do we need to determine the vapor pressure of the resulting solution Select all that apply 10 1 g C5H12 36 7 g C6H14 Omolar masses of C5H12 and C6H14 0 vapor pressure of C5H12 at 25 C 511 torr 0 vapor pressure of C6H14 at 25 C 150 torr

Calculate the freezing point and the boiling point of each of the following aqueous solutions Assume complete dissociation Assume that water freezes at 0 00 C and boils 0 51 C at 100 000 C K 1 86 C Kb molal molal a 0 030 m MgCl Tf T b 0 030 m FeCl3 T To C C C C

At 25 C the vapor in equilibrium with a solution containing carbon disulfide and acetonitrile has a total pressure of 263 torr and is 60 0 mole percent carbon disulfide What is the mole fraction of carbon disulfide in the solution At 25 C the vapor pressure of carbon disulfide is 375 torr Assume the solution and vapor exhibit ideal behavior Mole fraction