Question

Why happen to the freezing point of water is ethylene glycol is added to it

Answer 1

When you take it one step further, creating a 30/70 mixture of water and ethylene glycol, the boiling point rises to 235°F (113°C) and the freezing point lowers to -67°F (-55°C). ... If we add chemicals to water, however, the molecules will have to work harder to join together and crystallize.