How many liters of ethylene glycol antifreeze (C 2H 6O 2) would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to –17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, K f = 1.86°C/m.)

Explanation:

Hello,

In this case, we can use the freezing point depression formula in order to compute the molality of the mentioned solute (ethylene glycol) considering a van't hoff factor of 1 since it is a covalent molecule:

Next, since water density is 1 kg/L and molal units are mol/kg, we compute the present moles of solute:

Next, the mass with its molar mass (62.07 g/mol):

Finally, with the given density we compute the required volume in liters:

Best regards.

Verification of Results

Explanation:

The process of collecting five sample of water from different sources is carried to verify the

Iresult. By collecting water from five different location of same source the researcher can truly ascertain the quality of the water in her vicinity of stay.

If after samples are tested it is discovered the water isn't healthy, the results would be accepted as it has been properly verified and appropriate action would be taken.