One class, represented by gelatin, will redissolve on warming or diluting, while the other class, containing such substances as silica, albumen, and metallic, hydrosulphides, will solidify on heating or on the addition of electrolytes to form a solid "gel" which cannot be redissolved.
A standard sodium hydrate solution can be prepared by dissolving 42 grammes of sodium hydrate, making up to a litre, and diluting until one cubic centimetre is exactly equivalent to one cubic centimetre of the sulphuric acid.
Of course, in applying the method means must be adopted for suitably diluting the bacterial mixture.
Diluting squash well will make it less sugary, but again try to keep it to mealtimes.
I like to keep fresh-frozen strawberries in my freezer and I have found that using them instead of ice cubes adds more strawberry flavor instead of diluting the flavor like ice would.