Question

In: Physics

A solution of sucrose is prepared by dissolving 0.5 g in 100 g of water. Calculate:...

A solution of sucrose is prepared by dissolving 0.5 g in 100 g of water. Calculate: a. Percent weight in weight b. The molal concentration of sucrose and water c. The mole fraction of sucrose and water in the solution

Expert Solution

Solution of sucrose has 0.5g sucrose in 100g of water

a) Percent weight in weight is given by

m of solution=0.5+100=100.5g

b) Molal concentration or molality is defined as

where m_solvent is mass of water in our case=100g=0.1kg

n_solute is number of moles of sucrose

Molar mass of sucrose=342.3g/mol

Hence number of moles=

c)For mole fraction

Lets calculate number of moles of water

As molar mass of water is 18.02

moles

Mole fraction sucrose

Mole fraction water

genius_generous answered 2 years ago

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