Chemistry Problem. Please show steps.

Chemistry
Tutor: None Selected Time limit: 1 Day

Determine the required concentration (in percent by mass) for an aqueous ethylene glycol (C2H6O2) solution to have a boiling point of 104.0 °C.

Oct 3rd, 2015

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.Kb = 0.512°C/m. of water

CHANGE in temperature = kb * Molarity

change in temperature = 0.152 * Molarity of solution


104-100 c = 0.152* M

4 Celcius = 0.152M

molarity of water  = 4/ 0.152 =  26.32

mass of water =  26.32 * 18 = 473.68g

mass of ethyl glycol = 1000g - 473.68 = 526.32g

% weight = 526.32g/1000g * 100% = 52.632%


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Sep 15th, 2015

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