Common Ion Quiz: Test!

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Common Ion Quiz: Test! - Quiz

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Questions and Answers
  • 1. 

    Potassium: (Write symbol, one space then valency- eg. Ph 3-)

    Explanation
    The correct answer is K 1+. Potassium is represented by the symbol K and has a valency of 1+. This means that potassium has a tendency to lose one electron in chemical reactions, resulting in a positive charge of 1+.

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  • 2. 

    Sulfate:

    Explanation
    The given answer "SO4 2-" is correct because it represents the sulfate ion. The sulfate ion is composed of one sulfur atom bonded to four oxygen atoms, with a charge of -2. The formula SO4 2- indicates that there are two more electrons than protons in the ion, giving it a negative charge. This ion is commonly found in various compounds and salts, such as sodium sulfate (Na2SO4) and calcium sulfate (CaSO4).

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  • 3. 

    Zinc:

    Explanation
    Zn 2+ is the correct answer because it represents the zinc ion with a charge of +2. The symbol "Zn" is used to represent the element zinc, and the superscript "+2" indicates that the zinc ion has lost two electrons, resulting in a positive charge.

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  • 4. 

    Calcium:

    Explanation
    The correct answer is Ca 2+ because calcium typically forms a 2+ charge when it loses two electrons.

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  • 5. 

    Hydroxide:

    Explanation
    The correct answer is OH 1-. This answer represents the hydroxide ion, which is a negatively charged particle composed of one oxygen atom and one hydrogen atom. The hydroxide ion is commonly found in chemical reactions and is known for its basic properties. It is often found in compounds such as sodium hydroxide (NaOH) and calcium hydroxide (Ca(OH)2).

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  • 6. 

    Carbonate:

    Explanation
    The correct answer is CO3 2-. CO3 2- refers to the carbonate ion, which consists of one carbon atom bonded to three oxygen atoms. This ion has a charge of 2-, indicating that it has gained two electrons. Carbonate ions are commonly found in compounds such as calcium carbonate (CaCO3), which is a major component of limestone and coral reefs.

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  • 7. 

    Bromide:

    Explanation
    The given answer "Br 1-" is the correct answer because it represents the bromide ion. The symbol "Br" represents the element bromine, and the superscript "-1" indicates that it has gained one electron, giving it a single negative charge. This ion is formed when bromine atom gains an electron to achieve a stable electron configuration.

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  • 8. 

    Sodium:

    Explanation
    The correct answer is Na 1+ because sodium has a +1 charge. Sodium is a metal that readily loses one electron to achieve a stable electron configuration, resulting in a +1 charge.

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  • 9. 

    Iodide:

  • 10. 

    Iron:

    Explanation
    The correct answer is Fe 2+ or 3+ because iron can exist in two common oxidation states, +2 and +3. The Roman numerals indicate the oxidation state of the iron ion. In the +2 state, iron loses two electrons, while in the +3 state, it loses three electrons. These different oxidation states allow iron to form a variety of compounds and participate in various chemical reactions.

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  • 11. 

    Chloride:

    Explanation
    Chloride is an anion with a charge of -1, represented by Cl 1-. This means that it has gained one electron, resulting in an overall negative charge. The Cl 1- ion is commonly found in compounds such as sodium chloride (NaCl) and potassium chloride (KCl). It is important in various biological processes and is also used in industrial applications such as water treatment and chemical synthesis.

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  • 12. 

    Oxide:

    Explanation
    The given answer "O 2-" is the correct answer because the term "oxide" refers to a compound that contains oxygen in the form of an anion with a charge of -2. The symbol "O" represents oxygen, and the superscript "-2" indicates that it has gained two electrons, giving it a negative charge of 2-. Therefore, the correct answer is O 2-.

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  • 13. 

    Phosphate:

    Explanation
    The answer is PO4 3- because phosphate is an ion that consists of one phosphorus atom bonded to four oxygen atoms. The charge on the phosphate ion is 3-, indicating that it has gained three electrons to achieve a stable configuration. This is represented by the formula PO4 3-.

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  • 14. 

    Nitrate:

  • 15. 

    Aluminium:

    Explanation
    The correct answer is Al 3+ because "Al" represents the symbol for the element aluminum and "3+" indicates that the aluminum ion has a positive charge of +3.

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  • 16. 

    Ammonium:

  • 17. 

    Hydrogen:

    Explanation
    The given answer, H 1+, represents a hydrogen ion with a positive charge. Hydrogen typically has one proton and one electron, resulting in a neutral charge. However, when hydrogen loses its electron, it becomes a positively charged ion with only one proton. This ion is represented as H 1+, indicating the loss of one electron.

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  • 18. 

    Magnesium:

    Explanation
    The correct answer is Mg 2+ because the symbol "Mg" represents the element magnesium, and the superscript "2+" indicates that the magnesium ion has a positive charge of 2. This means that the magnesium atom has lost two electrons, resulting in a cation with a 2+ charge.

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  • 19. 

    Hydrogen Carbonate:

    Explanation
    Hydrogen carbonate, represented as HCO3 1-, is an ion that consists of one hydrogen atom, one carbon atom, and three oxygen atoms. The -1 charge indicates that it has gained one electron, giving it a negative charge. This ion is formed when carbonic acid (H2CO3) donates a proton (H+) to water (H2O), resulting in the formation of bicarbonate (HCO3-) and a hydronium ion (H3O+). Hydrogen carbonate is an important ion in chemistry and biology, playing a role in the regulation of pH in the blood and acting as a buffer to maintain the acid-base balance.

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  • 20. 

    Sulfite:

    Explanation
    Sulfite is represented by the chemical formula SO3 2-. The 2- indicates that the sulfite ion has a charge of -2, meaning it has gained two electrons. The SO3 part of the formula represents the molecular structure of sulfite, which consists of one sulfur atom bonded to three oxygen atoms. This combination of atoms and their arrangement gives sulfite its chemical properties and behavior.

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  • 21. 

    Lead:

  • 22. 

    Copper:

    Explanation
    The answer "Cu 1+ or 2+" indicates that copper can exist in two different oxidation states, either +1 or +2. This means that copper atoms can lose one or two electrons to form ions with a positive charge. The Roman numerals in the answer indicate the oxidation state of the copper ions.

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  • 23. 

    Silver:

    Explanation
    The symbol for the chemical element silver is Ag. It is a monovalent cation, meaning it has a charge of +1. Silver ions are formed when a silver atom loses one electron. These ions are often encountered in chemical reactions involving silver, and they contribute to the properties and behavior of silver in various compounds.

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  • 24. 

    Sulfide:

    Explanation
    The correct answer is S 2-. Sulfide is an ion that has a charge of 2-. This means that it has gained two electrons, giving it a negative charge. The symbol "S" represents sulfur, which is a nonmetallic element found in the periodic table. The 2- superscript indicates the charge of the sulfide ion.

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  • Current Version
  • Apr 01, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 25, 2011
    Quiz Created by
    Ip02528
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