Question 1

Which of the following ions is correctly paired with its name and charge?

Accepted Answer

$$NH_4$$^+, ammonium ion, 1+ charge

Question 2

A patient is diagnosed with iron-deficiency anemia. Which ion is most directly related to this condition?

Accepted Answer

$$Fe^{2+}$$, iron(II) or ferrous ion

Question 3

Which of the following formulas represents the nitrate ion?

Accepted Answer

$$NO_3$$^{-}

Question 4

What is the correct formula for the compound formed between aluminum ion and sulfate ion?

Accepted Answer

$$Al_2$$($$SO_4)_3$$

Question 5

Which of the following ions is a polyatomic cation?

Accepted Answer

$$NH_4^+$$

Question 6

A solution contains both $$Ba^{2+}$$ and $$SO_4$$^{2-} ions. What precipitate is most likely to form?

Accepted Answer

$$BaSO_4$$

Question 7

Which of the following ions is NOT correctly matched with its charge?

Accepted Answer

$$PO_4$$^{3-}, 2- charge

Question 8

Which ion is commonly found in table salt and is essential for nerve function?

Accepted Answer

Na^+, sodium ion

Question 9

What is the correct name for the ion with the formula $$Pb^{2+}$$?

Accepted Answer

Lead(II) ion or plumbous ion

Question 10

Which of the following ions is a common component of household bleach?

Accepted Answer

ClO^-, hypochlorite ion

Question 11

A compound contains the ions $$Mg^{2+}$$ and $$NO_3^-. $$What is the correct formula for this compound?

Accepted Answer

Mg($$NO_3)_2$$

Question 12

Which of the following ions is most likely to be found in bones and teeth?

Accepted Answer

$$PO_4$$^{3-}, phosphate ion

Question 13

Which ion is responsible for the blue color in copper(II) sulfate solutions?

Accepted Answer

$$Cu^{2+}$$, copper(II) ion

Question 14

Which of the following ions is a component of DNA and ATP?

Accepted Answer

$$PO_4$$^{3-}, phosphate ion

Question 15

What is the correct formula for the compound formed between calcium ion and phosphate ion?

Accepted Answer

$$Ca_3$$($$PO_4)_2$$

Question 16

Which of the following ions is most likely to be found in a solution of vinegar?

Accepted Answer

CH_3COO^-, acetate ion

Question 17

Which ion is commonly used in batteries and is essential for nerve and muscle function?

Accepted Answer

K^+, potassium ion

Question 18

Which of the following ions is a strong oxidizing agent and is used in disinfectants?

Accepted Answer

$$MnO_4$$^-, permanganate ion

Question 19

What is the correct name for the ion with the formula $$Sn^{2+}$$?

Accepted Answer

Tin(II) ion or stannous ion

Question 20

Which of the following ions is most likely to be found in hard water and can cause scale buildup in pipes?

Accepted Answer

$$Ca^{2+}$$, calcium ion

Common Cations and Anions: Essential Reference for Ionic Compounds

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