How would you prepare a 1.50 molal solution of sucrose in water? At what temperature would...

How would you prepare a 1.50 molal solution of sucrose in water? At what temperature would the solution begin to boil?

thank you

Expert Solution

Since molality is = Number of moles of solute / Mass of solvent in kg

Calculate the weight of sucrose = 1.5 moles in gms

-------------------------------------------- = 342.297 + 171.149 = 513.445 gms.

[ note that one mole of an entitty (in this case sucrose ) is equal to its molecular mass ]

therefore, for preparing 1.5 molal solution of sucrose , C12 H22 O11 ( molecular mass = 342.297 ) we should weigh 1.5 moles ,or 513.45 gms. of sucrose & add it to 1 kg ( or = 1000 gms. ) of water to get a clear solution.

Calculate the elevation in Boiling Point of water using the following relation -

T_b - T_{b ⁰} = K_b . m

, where m = molality of solution given as 1.5 , K_b = Molal Elevation constant of solvent which is 0.52 K kg mol^-1 for water in this case , T_b^o = boiling point of pure solvent ie. water in K = 373.15 K

T_b = boiling point of solution ( ie sucrose solution in this case )

So , T_b - 373.15 = 0.52 x 1.5 = 0.78

-----------------T_b = 373.93 K

Hence the 1.5m sucrose solution would begin to boil at 373.93K

**********************************************************************************************************************************

queen_honey_blossom answered 7 months ago

describe how you would prepare 1.25L of a 0.025 M sucrose solution from a stock solution...

describe how you would prepare 1.25L of a 0.025 M sucrose solution from a stock solution with concentration of 5.00 M.

You prepare a solution by dissolving 50.4g sucrose (C12H22O11) in 0.332 kg of water. The final...

You prepare a solution by dissolving 50.4g sucrose (C12H22O11) in 0.332 kg of water. The final volume of the solution is 355 mL. Calculate the concentration of the solution in each unit. 1 mole C12H22O11 = 342.296 g sucrose (a) Molarity (b) Molality (c) Percent by mass (d) Mole fraction

How would you make a 1.75M solution of sucrose using solid sucrose, a 2mL graduated pipet,...

How would you make a 1.75M solution of sucrose using solid sucrose, a 2mL graduated pipet, and a 25mL volumetric flask? How would you make a 0.500M solution of sucrose by diluting the solution in the previous question?

The boiling water of a 0.143 molal aqueous solution of MgCl2 is measured to be 100.639...

The boiling water of a 0.143 molal aqueous solution of MgCl2 is measured to be 100.639 C. Determine the van't Hoff factor for this salt . [Note: The boiling point elevation constant for water is 1.86 C Kg/ mol

If you were preparing a 100 mL of a 2% sucrose solution. How much sucrose is...

If you were preparing a 100 mL of a 2% sucrose solution. How much sucrose is needed to make this solution? How do you make a 1% MgCl2 solution? When you make coffee and add cream and sugar, what is the solvent?

What mass of sucrose (C12H22O11) should be combined with 461g of water to make a solution...

What mass of sucrose (C12H22O11) should be combined with 461g of water to make a solution with an osmotic pressure of 8.20atm at 305K ? (Assume the density of the solution to be equal to the density of the solvent.)

Describe how you would prepare 2 mL of solution containing NaCl, MES buffer, and water. NaCl...

Describe how you would prepare 2 mL of solution containing NaCl, MES buffer, and water. NaCl stock solution is 1M and the working concentration required is 5mM. MES buffer stock solution is 100 M and the working concentrations required is 20 mM. To make 2 mL of solution calcualte the amount of water you would add. Please Show Work

1. Describe how you would prepare 1.50 L of a 0.500 M phosphate buffer with a...

1. Describe how you would prepare 1.50 L of a 0.500 M phosphate buffer with a pH of 7.5. (show work) 2. If 5.00 mL of 0.150 M HCl is added to 0.750 L of your buffer from (1), what will the new ph be? (show work) 3. If 10.00 mL of 1.50 M NaOH is added to 0.750 L of your buffer from (1), what will the new ph be? (show work)

Both sucrose and glucose are nonvolatile solutes. If you prepare a solution by combining 6.50 mol...

Both sucrose and glucose are nonvolatile solutes. If you prepare a solution by combining 6.50 mol of water with 0.200 mol sucrose and 0.300 mol glucose, what will the vapor pressure (torr) of the solution be if you heat the solution to 35°C?

A solution contains 3.50 mol of water and 1.50 mol of nonvolatile glucose (C6H12O6). a. What...

A solution contains 3.50 mol of water and 1.50 mol of nonvolatile glucose (C6H12O6). a. What is the mole fraction of water in this solution? b. What is the vapor pressure of the solution at 25°C, given that the vapor pressure of pure water at 25 °C is 23.8 torr?

Question