Water can't melt!!!
Timber
The melting point of salt water is even lower than pure water.
Salt will lower the melting point, and raise the boiling point of water.
Ethylene glycol is antifreeze. The mixture has a lower melting point than pure water.
You would need to look at a temperature / pressure graph
That depends on how much salt is dissolved in the water. Generally, the boiling point will be higher than for pure water, and the melting point will be lower than for pure water.
It has a lower melting point than water.
It is the opposite. The boiling point is greater than the melting point. for example for fresh water, the boiling point is 100 centigrade while the melting point (for ice) is zero.
Plastic water bottles can melt when hot water is placed in them due to the low melting point of the plastic material used to make the bottles, such as polyethylene terephthalate (PET). When the hot water comes into contact with the plastic, it can cause the polymer chains in the plastic to break, leading to melting or deformation of the bottle. It is important to use bottles specifically designed to withstand hot liquids to avoid this issue.
the melting point of IMPURE water is lower because excess chemicals and sediments (and whatever else making it impure) get in the way of the water freezing directly by making it so that when the the water froze, it also had to freeze the sediments and chemicals (or else it wouldn't be frozen)
The freezing point of salted water is lower compared with the freezing point of pure water. So when melting frozen salt water is colder.
I use Petroleum Jelly, (Vaseline) in my wax and it lowers the melting point a bit.