Chemistry, 26.10.2019 04:43 chloe081

1. if 100.0 grams of ethylene glycol are dissolved in 900.0 grams of water, what is the freezing temperature of the solution formed? follow these steps: show all of your calculations. calculate the molar mass of ethylene glycol: 62.07 g/mol calculate the number of moles of ethylene glycol in the solution: calculate the molality of ethylene glycol: calculate the freezing point depression using the kf from the chemistry b information sheet and the molality that you calculated: calculate the freezing point of the solution. 2. think about the result. think about the typical mid-winter temperature we experience in michigan. is this concentration of ethylene glycol high enough to use in a car radiator in the winter? why or why not? hurry

Answers: 1

Show answers

Answers

Answer from: cbogrett

Data:

Solute: 100.0 grams of ethylene glycol
Solvent 900.0 grams of water,

Question: what is the freezing temperature of the solution formed?

Solution

Follow these steps.

Calculate the molar mass of ethylene glycol: 62.07 g/mol

ethylene glycol = C2H6O2

=> molar mass = 2 * 12.011 g/mol + 6 *1.008 g/mol + 2 * 15.999 g/mol = 62.068 g/mol = 62.07 g/mol

Calculate the number of moles of ethylene glycol in the solution

number of moles = mass in grams / molar mass = 100.0 g / 62.07 g/mol = 1.611 mol

Calculate the molality of ethylene glycol

m = moles of solute / kg of solvent = 1.611 mol / 0.9000 kg = 1.79 m

Calculate the freezing point depression using the Kf from the Chemistry B Information Sheet and the molality that you calculated

ΔTf = kf * m

kf = 1.86°C / m

ΔTf = 1.86 °C / m * 1.79 m = 3.329 °C

Calculate the freezing point of the solution.

Tf = 0°C - 3.329°C = - 3.329 °C.

2. Think about the result. Think about the typical mid-winter temperature we experience in Michigan. Is this concentration of ethylene glycol high enough to use in a car radiator in the winter? Why or why not?

Given that the typical mid-winter temperature we experience in Michigan is way below - 3.329 °C, this concentration of ethylene glycol is not high enough to use in car radation in the winter, because the water would freeze at - 3.329°C.

Answer from: Quest

The mass has escaped into a gas which you can not see so the law stays true.

Answer from: Quest

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

Another question on Chemistry

Chemistry, 21.06.2019 16:00

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

Answers: 1

Answer

Chemistry, 21.06.2019 22:00

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Answers: 1

Answer

Chemistry, 22.06.2019 00:30

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

Answers: 2

Answer

Chemistry, 22.06.2019 08:00

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods

Answers: 1

Answer

You know the right answer?

1. if 100.0 grams of ethylene glycol are dissolved in 900.0 grams of water, what is the freezing tem...

Questions