Question
In ____ reactions, elements from two different compounds swap places with each other to form two new compounds.
Answer
In double-displacement reactions, elements from two different compounds swap places with each other to form two new compounds.
Note: For example, when solutions of calcium chloride and silver nitrate are combined, insoluble silver chloride forms in a solution of calcium nitrate.
Note: A series of double-displacement reactions is depicted in Figure 4.5. Shown are illustrations of test tubes in which Zn(NO3)2 is dissolved in solutions to precipitate solid zinc salts. From left to right, the solutions are (NH4)2S, NaOH, and Na2CO3.
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Formula unit represents ____.
____ represents the empirical formula of an ionic compound, since they do not form true molecules, rather a coordinated lattice.
____ weight is the term used for ionic compounds "molecular" weight as no molecule actually exists, its just a lattice structure.
____ compounds form from elements of similar electronegativity.
Atomic weight is ____.
____ is a weighted average of the masses of the naturally occurring isotopes of an element, not their weights.