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Ch.3 - Molecules and Compounds
Tro - Chemistry: A Molecular Approach 6th Edition
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 6th EditionCh.3 - Molecules and CompoundsProblema 37
Capitolo 3, Problema 37

Write a formula for the compound that forms between potassium and each polyatomic ion. a. acetate b. phosphate c. sulfate d. nitrate

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insert step 1: Identify the charge of the potassium ion (K^+).
insert step 2: Identify the formula and charge of each polyatomic ion: a. acetate (C_2H_3O_2^-), b. phosphate (PO_4^{3-}), c. sulfate (SO_4^{2-}), d. nitrate (NO_3^-).
insert step 3: Combine potassium ion with each polyatomic ion to form neutral compounds.
insert step 4: For each compound, balance the charges by adjusting the number of potassium ions needed to neutralize the charge of the polyatomic ion.
insert step 5: Write the chemical formula for each compound: a. potassium acetate, b. potassium phosphate, c. potassium sulfate, d. potassium nitrate.

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Ionic Compounds

Ionic compounds are formed when metals transfer electrons to nonmetals, resulting in the formation of positively charged cations and negatively charged anions. In this case, potassium (K) acts as the cation, while the polyatomic ions (like acetate, phosphate, sulfate, and nitrate) serve as the anions. The overall charge of the compound must be neutral, which dictates the ratio of cations to anions in the formula.
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Ionic Compounds Naming

Polyatomic Ions

Polyatomic ions are ions that consist of two or more atoms covalently bonded together, carrying a net charge due to the loss or gain of electrons. Examples include acetate (C2H3O2-), phosphate (PO4^3-), sulfate (SO4^2-), and nitrate (NO3-). Understanding the charge and composition of these ions is crucial for writing the correct formulas for the resulting ionic compounds with potassium.
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Polyatomic Ion Variations

Chemical Formula Writing

Writing chemical formulas involves combining the symbols of the elements or ions in a compound, ensuring that the total positive and negative charges balance to zero. For potassium and each polyatomic ion, the formula is derived by determining the necessary number of potassium ions to balance the charge of the polyatomic ion. This process is essential for accurately representing the compound's composition.
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Writing Formulas
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