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General Chemistry: Polyatomic Ions

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Termini in questo insieme (20)

  • What is a polyatomic ion?

    A polyatomic ion is a charged species composed of two or more atoms covalently bonded that act as a single ion.

  • Name the polyatomic ion with formula \(\mathrm{NO_3^-}\).

    Nitrate is the polyatomic ion with formula \(\mathrm{NO_3^-}\).

  • What is the charge on the sulfate ion?

    The sulfate ion, \(\mathrm{SO_4^{2-}}\), has a charge of 2-.

  • Give the formula and charge for the ammonium ion.

    The ammonium ion is \(\mathrm{NH_4^+}\) with a charge of 1+.

  • What polyatomic ion has the formula \(\mathrm{OH^-}\)?

    Hydroxide is the polyatomic ion with formula \(\mathrm{OH^-}\).

  • How do you name polyatomic ions with oxygen?

    Polyatomic ions with oxygen are called oxyanions. The one with fewer oxygens ends with -ite, and the one with more oxygens ends with -ate.

  • What is the formula for the carbonate ion?

    Carbonate ion has the formula \(\mathrm{CO_3^{2-}}\).

  • What is the charge on the phosphate ion?

    The phosphate ion, \(\mathrm{PO_4^{3-}}\), has a charge of 3-.

  • Name the polyatomic ion \(\mathrm{ClO_4^-}\).

    Perchlorate is the polyatomic ion with formula \(\mathrm{ClO_4^-}\).

  • What is the difference between nitrate and nitrite ions?

    Nitrate is \(\mathrm{NO_3^-}\) and nitrite is \(\mathrm{NO_2^-}\). Nitrate has one more oxygen.

  • What polyatomic ion has the formula \(\mathrm{CN^-}\)?

    Cyanide is the polyatomic ion with formula \(\mathrm{CN^-}\).

  • How are polyatomic ions used in naming ionic compounds?

    Polyatomic ions act as a single charged unit in ionic compounds and are named as such in the compound's name.

  • What is the formula and charge of the acetate ion?

    Acetate ion has the formula \(\mathrm{C_2H_3O_2^-}\) or \(\mathrm{CH_3COO^-}\) with a charge of 1-.

  • What is the formula for the hydrogen carbonate ion?

    Hydrogen carbonate (or bicarbonate) ion is \(\mathrm{HCO_3^-}\).

  • What is the charge on the dichromate ion?

    The dichromate ion, \(\mathrm{Cr_2O_7^{2-}}\), has a charge of 2-.

  • Name the polyatomic ion \(\mathrm{MnO_4^-}\).

    Permanganate is the polyatomic ion with formula \(\mathrm{MnO_4^-}\).

  • What is the formula for the chlorite ion?

    Chlorite ion has the formula \(\mathrm{ClO_2^-}\).

  • What is the formula and charge of the thiosulfate ion?

    Thiosulfate ion is \(\mathrm{S_2O_3^{2-}}\) with a charge of 2-.

  • How do you recognize a polyatomic ion in a chemical formula?

    Polyatomic ions appear as groups of atoms in parentheses with a charge, e.g., \((\mathrm{SO_4})^{2-}\).

  • What is the formula for the hypochlorite ion?

    Hypochlorite ion has the formula \(\mathrm{ClO^-}\).