Ethylene glycol is the common name for the liquid used to keep the coolant in au

Question

Ethylene glycol is the common name for the liquid used to keep the coolant in automobile cooling 6207 g'mcl, and its density is 1.106 gimL at 20 a. What is the empirical formula of ethylene glyool? s from freezing. It is 38.7% carbon, 9 7 en, and 51.6% oxygen by mass. Its molar mass is The empirical formula is b. What is the molecular formula of ethylene glyool? The molecular formula is c. in a sokution gropared by mikng ecual volumes of water and etylene shool, which ingredient is the solute and which is the solvent? Elhylene pycal sthe scan and wateris the scu O Ethylene glycol is the solute and water is the solvent

Explanation / Answer

a) Suppose we take 1 mole (62.07 g) of ethylene glycol

Mass of Carbon in 1 mole = 38.7 x 62.07 / 100 = 24.02 g

=> Moles of Carbon = 24.02 / 12 = 2

Mass of Hydrogen in 1 mole = 9.7 x 62.07 / 100 = 6

=> Moles of Hydrogen atom= 6 / 1 = 6

Mass of Oxygen = 51.6 x 62.07 / 100 = 32

=> Moles of Oxygen atom = 32 / 16 = 2

Therefore Molecular formula of Ethylene Glycol is C2H6O2

Emperical formula: CH3O

Suppose we mix 100 mL of each

Mass of Ethylene Glycol in 100 mL = 1.106 x 100 = 110.6 g

Mass of Water in 100 mL = 1 x 100 = 100 g (density of water = 1 g / mL)

We see that Mass of Ethylene Glycol mixed > Mass of Water mixed

=> Ethylene Glycol is the solvent and water is the solute

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