Answer
409.8k+ views
Hint:$10\% $ by w/w solution of glucose means there is $10g$ of glucose and $90g$ of water in $100g$ of solution. And the Molality is calculated by no. of moles of solute/ mass of solvent in Kilograms. The concentrations which are expressed in molality are used while studying properties of solutions
Formula Used:Molality no. of moles of solute/ mass of solvent
Complete step by step answer:
Here, mass of glucose is $10g$ as given in the question:
Moles of glucose = $10/180 = 0.556mole$
Molality is the total number of moles of a solute present in $1$ kilogram of a solvent.
We can say that, molality= number of moles of solute/ mass of solvent in Kg. Molality is expressed by “m”.
Formula of glucose is ${C_6}{H_{12}}{O_6}$ hence,
Atomic mass of carbon= $12g$
Atomic mass of hydrogen = $1g$
Atomic mass of oxygen= $16g$
Molecular weight of glucose=$(12*6) + (1*12) + (16*6) = 180$
The solution of glucose in water which is $10\% $ w/w implies $10g$ of glucose in $100g$ of solution
Mass of solute= $10g$
Mass of solution=$100g$
Mass of solvent=$(100 - 10)g = 90g = 0.090Kg$
Molality = $0.556/0.090 = 0.617m$
Hence, option (B) is the correct option.
Additional Information:
Some uses of molality is: The concentrations which are expressed in molality are used while studying properties of solutions linked to vapor pressure and temperature changes. Molality is also used because its value does not change with variations in temperature. The volume of a solution, on the other hand, is somewhat dependent upon temperature.
Note:
Molarity is expressed by “M” whereas molality is expressed by “m” and these both express the concentration of a chemical solution. And always remember that $10\% $By w/w solution of glucose means there is $10g$ of glucose and $90g$ of water in $100g$ of solution. It will help in solving the problem given.
Formula Used:Molality no. of moles of solute/ mass of solvent
Complete step by step answer:
Here, mass of glucose is $10g$ as given in the question:
Moles of glucose = $10/180 = 0.556mole$
Molality is the total number of moles of a solute present in $1$ kilogram of a solvent.
We can say that, molality= number of moles of solute/ mass of solvent in Kg. Molality is expressed by “m”.
Formula of glucose is ${C_6}{H_{12}}{O_6}$ hence,
Atomic mass of carbon= $12g$
Atomic mass of hydrogen = $1g$
Atomic mass of oxygen= $16g$
Molecular weight of glucose=$(12*6) + (1*12) + (16*6) = 180$
The solution of glucose in water which is $10\% $ w/w implies $10g$ of glucose in $100g$ of solution
Mass of solute= $10g$
Mass of solution=$100g$
Mass of solvent=$(100 - 10)g = 90g = 0.090Kg$
Molality = $0.556/0.090 = 0.617m$
Hence, option (B) is the correct option.
Additional Information:
Some uses of molality is: The concentrations which are expressed in molality are used while studying properties of solutions linked to vapor pressure and temperature changes. Molality is also used because its value does not change with variations in temperature. The volume of a solution, on the other hand, is somewhat dependent upon temperature.
Note:
Molarity is expressed by “M” whereas molality is expressed by “m” and these both express the concentration of a chemical solution. And always remember that $10\% $By w/w solution of glucose means there is $10g$ of glucose and $90g$ of water in $100g$ of solution. It will help in solving the problem given.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)