Ask a Question

An aqueous solution of `2` per cent `(wt.//wt)` non-volatile solute exerts a pressure of `1.004` bar at the boiling point of the solvent. What is the

in Education by
An aqueous solution of 2 per cent (wt./wt) non-volatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is the molecular mass of the solute? Select the correct answer from above options

1 Answer

0 votes
by
Correct Answer - Mw2=41.35gmol-1 p∘=1atm=1.013bar,pS=1.004bar W2=2g,Wsol=100g,W1=100-2=98g For dilute solution , use the relation : p∘-pS P∘ = n2 n1+n2 = n2 n1 = W2/Mw2 W1/Mw1 (1.013-1.004)bar 1.013bar = 2g Mw2 × 18gmol-1 98g Mw2= 2×18 98 × 1.013 0.009 gmol-1 =41.35gmol-1

Related questions

0 votes
Q: A solution containing `30 g` of a non-volatile solute exactly in `90 g` water has a vapour pressure of `2.8 kPa` at `298 K`. Further `18 g` of water i
    A solution containing 30g of a non-volatile solute exactly in 90g water has a vapour pressure of 2.8kPa at 298K. ... of water at 298K. Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: What will happen to the boiling point of a solutin if the weight of the solute dissolved is doubled but the weight of solvent taken is halved ?
    What will happen to the boiling point of a solutin if the weight of the solute dissolved is doubled but the ... taken is halved ? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: At `300 K`, `36 g` of glucose present per litre in its solution has an osmotic pressure of `4.98 bar`. If the osmotic pressure of the solution is `1.5
    At 300K , 36g of glucose present per litre in its solution has an osmotic pressure of 4.98 ¯ . If the ... would be its concentration? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Calculate the mass of a non-volatile solute ( molecular mass `40`) which should be dissolved in `114 g` octane to reduce its vapour pressure to `80%`.
    Calculate the mass of a non-volatile solute ( molecular mass 40 ) which should be dissolved in 114g octane to ... pressure to 80% . Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Why vapour pressure of a liquid decreases when a non`-` volatile solute is added to it ?
    Why vapour pressure of a liquid decreases when a non- volatile solute is added to it ? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: The vapour pressure of water is `12.3 kPa` at `300 K`. Calculate vapour pressure of `1` molal solution of a solute in it.
    The vapour pressure of water is 12.3kPa at 300K . Calculate vapour pressure of 1 molal solution of a solute in it. Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Based on solute `-` solvent interactions, arrange the following in order of increasing solubility in `n-`octane and explain the result. Cyclohexane, `
    Based on solute - solvent interactions, arrange the following in order of increasing solubility in n- octane and ... CHM3OH,CHM3CN . Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: An aqueous solution of `K_(2)SO_(4)` is diluted by adding water. How the values of `G, k, wedge_(m)` and `wedge_(eq)` vary ?
    An aqueous solution of K2SO4 is diluted by adding water. How the values of G,k,∧m and ∧eq vary ? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
Q: Calculate the mass of urea `(NH_(2)CONH_(2))` required in making `2.5 kg `of `0.25 `molal aqueous solution.
    Calculate the mass of urea (NH2CONH2) required in making 2.5kg of 0.25 molal aqueous solution. Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Heptane and octane form an ideal solution. At `373 K`, the vapour pressure of the two liquids are `105.0` kPa and `46.0` kPa, respectively. What will
    Heptane and octane form an ideal solution. At 373K , the vapour pressure of the two liquids are 105.0 kPa and ... and 35g of octane ? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving `1.0g` of polymer of molar mass `185,000` in `450mL` of water a
    Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0g of polymer of molar mass 185 ... at 37∘C . Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: The boiling point of water at `750mm Hg` is `99.63^(@)C`. How muCHM sucrose is to be added to `500 g` of water suCHM that it boils at `100^(@)C`.
    The boiling point of water at 750mmHg is 99.63∘C . How muCHM sucrose is to be added to 500g of water suCHM that it boils at 100∘C . Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Predict the products of electrolysis in eaCHM of the following `:` `a.` An aqueous solution of `AgNO_(3)` with silver electrodes. `b.` An aqeous solut
    Predict the products of electrolysis in eaCHM of the following : a. An aqueous solution of AgNO3 with silver ... platinum electrodes. Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: An aqueous solution of `CuSO_(4)` is electrolyszed using `Pt` electrodes in one case and `Cu` electrodes in another case. What are the products of ele
    An aqueous solution of CuSO4 is electrolyszed using Pt electrodes in one case and Cu electrodes in another case. What ... the cases ? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
Q: Concentrated nitric acid used in the laboratory work is `68%` nitric acid by mass in aqueous solution. What should be the molaritiy of such a sample o
    Concentrated nitric acid used in the laboratory work is 68% nitric acid by mass in aqueous solution. What should be ... 1.504gmL-1 ? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance

© Copyright 2018-2023 www.Blogmepost.com. All rights reserved. Developed by Blogmepost.

...