What do the terms anhydrous, hydrous, and undissociated mean?
Ether that contains no dissolved water is called anhydrous ether; when we remove the water of crystallization from a hydrate such as MgSO4•7H₂O, we call the MgSO4 anhydrous magnesium sulfate. The term anhydrous (Greek an-without + -hydor water) means "containing no water."
CuSO4•5H₂O is sometimes referred to as hydrous copper sulfate because hydrous (Greek: hydor water) means "containing water" and is typically used to describe compounds containing water of crystallization.
In aqueous solution, NaCl dissociates into Na⁺ and Cl⁻ ions, but glucose does not dissociate; instead, it remains as undissociated glucose molecules. The term "undissociated" (Old English "un-not") refers to not dissociated into simpler ions or molecules.
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Anhydrous refers to a substance that contains no water molecules. Hydrous refers to a substance that contains water molecules. Undissociated refers to a compound or molecule that has not undergone dissociation into its constituent ions in a solution.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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