Subject: Making ice without machinery

I am trying to learn how to make ice without
using any machinery.  on the internet it said to use the 
following .
1- mix up in large container a mild solution of water and 
sulphuric acid, with a handful of sodium sulphate (Gluaber Salt) 
thrown in.
2- Then place a smaller container filled with the water to be 
frozen in the solution.  The water will soon freeze.


My questions:
1: If I want to freeze a 1 gallon plastic jug, how much 
water,sulphuric acid and salt do I need?  The article said 
Glauber Salt, will any type  of Salt do?
How long will it take?

Another article said the following.
1:  use a chemical process such as vinegar and baking soda to 
generate CO2.
 Since the CO2 is heavier than air, it should replace the air in 
the inside container.  As the CO2 is generated into the 
container, it should freeze.

question:
1- to make dry ice using vinegar and baking soda solution-  how 
much of each is needed?
2-  If I want to make a Gallon of this solution how long will it 
take to freeze?  what will be the proper amounts of vinegar and 
baking  soda in a 1 gallon plastic jug?

I live in the tropics.  Last year the people of Puerto  Rico 
almost killed each other over a bag of ice when the hurricane hit 
this  island.  If you can tell me how to make a simple solution 
that can make ice be it  dry ice or
regular ice you will be helping a lot of people who live in a hot 
climate.

Re: Making ice without machinery