Q:

What is the difference between hydrate and anhydrate?

A:

Quick Answer

In chemistry, the term "hydrate" refers to a substance that contains water, while an anhydrous substance contains no water. Hydrates and anhydrates differ greatly in their reactions to water and their common uses.

 Know More

Full Answer

In organic chemistry, a hydrate is formed by the addition of hydrogen to another molecule to form a compound. Examples of organic hydrates are chloral hydrate, created from the reaction of hydrogen with chloral, and ethanol, formed when hydrogen is added to ethylene. In inorganic chemistry, the hydrate compound is formed when the compound contains water of crystallization. This happens when the hydrogen molecules have crystallized within the metal complex of the original molecule, or are bound to its metal center without changing the structure of the molecule.

By contrast, an anydrate or anhydrous material does not contain any water molecules. The water is usually removed by suction or by heating the substance to a high temperature. Anhydrous materials are typically used as drying agents because they absorb water from their surroundings. One example is a silica gel packet often included inside clothing pockets or other consumer goods to keep the surrounding area dry and mold-free. Many common anhydrates are quite dangerous to handle. Anhydrous ammonia, for example, is a pungent gas used as a fertilizer. The pungent fumes from this gas can suffocate a human and are extremely flammable. If ingested, it can cause quick dehydration.

Learn more about Chemistry

Related Questions

  • Q:

    What is the relationship between absorbance and concentration?

    A:

    There is a direct relationship between absorbance and concentration is the higher the absorbance of a substance, the more concentrated its solution will be in water or another medium. In chemistry, this is a principle known as the Beer-Lambert Law.

    Full Answer >
    Filed Under:
  • Q:

    How does a firefighter use chemistry?

    A:

    Firefighters need a strong understanding of chemistry for personal and public safety, to enhance the effectiveness of their efforts and to prevent adding to the many hazards present during a fire. A firefighter uses his or her understanding of the chemistry of building materials and furnishings as well as the interaction of suppression chemicals with fire.

    Full Answer >
    Filed Under:
  • Q:

    What is heating to constant mass?

    A:

    Heating to constant mass is a gravimetric technique in analytical chemistry used to determine the mass of an evolved product relative to the initial mass of unreacted material. The technique requires the production of a volatile gas, such as carbon dioxide evolved from the thermal decomposition of calcium carbonate.

    Full Answer >
    Filed Under:
  • Q:

    What is an iron ring in chemistry?

    A:

    An iron ring, sometimes referred to as an iron support ring, is used in chemistry labs to stabilize flasks mounted to a ring stand and support them over the work area. Some iron rings also include a clamp.

    Full Answer >
    Filed Under:

Explore