It lowers the freezing point.
Yes
Adding water to a washer solvent can dilute its antifreeze properties, as water reduces the overall concentration of the active antifreeze components. This dilution can lower the freezing point of the solution, making it less effective in preventing freezing in cold temperatures. Additionally, excess water can lead to increased ice formation and decreased performance of the solvent in protecting equipment and surfaces. Therefore, maintaining the appropriate balance of water in washer solvents is crucial for optimal antifreeze performance.
The dependent variable would be the freezing point of the solution.
You dilute your antifreeze. If you buy prediluted 50/50 antifreeze, then you'll dilute it more than you're supposed to. If you buy straight 100% antifreeze, you're actually supposed to dilute it yourself by adding an equal amount of water to the antifreeze you put it. Your vehicle will be fine. Stop freaking out. Get a coolant flush.
The antifreeze provides corrosion protection until the corrosion package is " used up " and it raises the boiling point and lowers the freezing point of the water
Yes. Never add pure antifreeze. Pure antifreeze will actually freeze before a 50/50 mix. Add coolant that is a 50/50 mix of antifreeze and distilled water. You can buy it already pre-mixed.
My engine coolant is a 50 / 50 mix of antifreeze and distilled water so adding water will just dilute the mixture more and weaken the antifreeze so the coolant mixture will freeze at a warmer temperature and it will reduce the corrosion protection if there is not at least 40 % antifreeze
Enviromentally, not so good. And why would anyone consider do such?
Your engine should be cold ( to be on the safe side) when adding antifreeze/coolant. i let the car sit overnight and then add it.
Water can be used in an emergency but there is no corrosion protection like a mixture of antifreeze and preferably distilled water ( until the corrosion protection in the antifreeze is " worn out " ) Also , adding just straight water will dilute the antifreeze so the temperature at which the mixture freezes will not be as low
( NO ) with the engine cool
Adding antifreeze to your radiator is a physical change because the antifreeze retains its chemical composition and properties when mixed with the water in the radiator. It does not undergo a chemical reaction to form a new substance.