Yes. The water is from the melting ice.
You don't ADD salt
I believe that Morton Ice Cream Salt is just standard rock salt, used in making homemade ice cream.
You add salt to ice to lower the temperature of the ice/water mixture. Without the salt, the temperature would not fall below 32.F, which is not cold enough to make ice cream. The freezing point of salt water is below that temperature and thus allows the cream to partially freeze, a necessary part of making ice cream Salt causes water to freeze at a much lower temperature. Adding salt to the ice causes the temperature of the brine solution to drop dramatically, while freezing the ice cream inside the container.
No, Epsom salt should not be used as a substitute for rock salt in making ice cream. Rock salt is used to lower the freezing point of the ice surrounding the ice cream maker, allowing the mixture to freeze and churn properly. Epsom salt is not suitable for this purpose and may not work effectively in the ice cream-making process.
You don't use rock salt in ice cream, unless you want salty ice cream. You use rock salt (though table salt or sea salt would work just about as well) in the freezer to get it colder than you could with a mixture of ice and water.
The amount of salt used in making ice cream is usually around 1/2 to 1 cup per quart of ice cream mixture.
The salt makes some of the ice melt (by reducing its melting temperature). The mixed ice/water/salt is now several degrees below the normal freezing temperature of water and causes the ice cream miix to freeze faster.
small salt dissolves quicker
Add salt to the ice to make it colder.
there are particals that they use.
The chemcial make up of table salt hampers the melting of the ice.
Rock salt is used because it causes the ice in the bucket to melt, but at the same time to be cold enough to freeze the ice cream inside of the canister. I am of course talking about the hand churned ice cream. If you didn't use salt, you would not be able to turn the canister to churn the ice cream mixture into a freezable substance.