Urea is an organic molecule composed of two amine groups connected by a carbonyl group. It was the first organic compound synthesised in a lab from inorganic precursors. Urea is found in mammals as a nitrogen-containing component of urine. It is the primary mechanism for the biological disposal of nitrogen in mammals. It is also used as a convenient nitrogen source for plant fertilisers. Urea is highly soluble in water. Dissolving urea in water will allow you to simply distribute it to plants you may wish to fertilise.
Place rubber gloves on your hands to avoid coming into direct contact with the urea.
Weigh your urea by placing it on your scale. Urea dissolves in water at a 1:1 mass ratio. That is, one gram of urea will dissolve in one gram of water. A gram of water has the volume of one millilitre and since it is simpler to measure liquids by volume, the measurement for water will be noted in volume.
Place the urea into a jar.
Measure a volume of water to dissolve the urea into. For every gram of urea, measure out one millilitre of water using measuring cups. A cup is equal to 250 millilitres, and a teaspoon is equal to roughly 5 millilitres. A common kitchen measuring cup set should provide you with all the cups you need to accurately measure the amount of water you will need to dissolve the urea.
Place the measured water into a saucepan and place it on the stove. Heat the water over high heat for approximately five minutes. The water should be warm, but doesn't have to be boiling. This step will aid in the dissolution of urea, but it isn't necessary. Urea will dissolve in room temperature water, but this will take longer.
Pour the warm water into the jar with the urea. The urea should rapidly dissolve into the water. You can stir or shake the jar (with the lid on, of course) to speed up the dissolution.
Urea is harmful if swallowed, inhaled or absorbed through the skin.
Tips and warnings
- Urea is harmful if swallowed, inhaled or absorbed through the skin.