Question 1

Which of the following combinations correctly matches a cation and an anion to form a neutral ionic compound, and what is its chemical formula?

Accepted Answer

Ba$$^{2+}$$ and SO$$_4^{2-}$$; formula: $$\mathrm{$$BaSO_4$$}$$

Question 2

A patient is diagnosed with cyanide poisoning. Which of the following ions is responsible for this condition?

Accepted Answer

CN$$^{-}$$

Question 3

Which of the following ions is a polyatomic cation?

Accepted Answer

NH$$_4^{+}$$

Question 4

If you combine Fe$$^{3+} ($$Iron(III)) with SO$$_4^{2-} ($$Sulfate), what is the empirical formula of the resulting compound?

Accepted Answer

$$\mathrm{Fe_2$(SO_4$)_3}$$

Question 5

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

Accepted Answer

Na$$^{+}$$ and Cl$$^{-}$$

Question 6

Which of the following ions is responsible for the purple color in potassium permanganate solution?

Accepted Answer

MnO$$_4^{-}$$

Question 7

A compound contains the ions Al$$^{3+}$$ and PO$$_4^{3-}. $$What is the correct formula for this compound?

Accepted Answer

$$\mathrm{$$AlPO_4$$}$$

Question 8

Which of the following ions is NOT a 2+ cation?

Accepted Answer

Na$$^{+}$$

Question 9

A patient presents with symptoms of hypokalemia. Which ion concentration is abnormally low?

Accepted Answer

K$$^{+}$$

Question 10

Which of the following ions is commonly used as an electrolyte in sports drinks to help prevent muscle cramps?

Accepted Answer

K$$^{+}$$

Question 11

Which of the following ions is a 3- anion?

Accepted Answer

PO$$_4^{3-}$$

Question 12

If you mix Ca$$^{2+}$$ and Cl$$^{-}$$ ions in water, what is the correct formula for the resulting compound?

Accepted Answer

$$\mathrm{$$CaCl_2$$}$$

Question 13

Which of the following ions is most likely to be found in a solution used to treat iron-deficiency anemia?

Accepted Answer

Fe$$^{2+}$$

Question 14

Which of the following ions is a common component of baking soda?

Accepted Answer

HCO$$_3^{-}$$

Question 15

A solution contains both Mg$$^{2+}$$ and SO$$_4^{2-}$$ ions. What is the formula of the precipitate that may form?

Accepted Answer

$$\mathrm{$$MgSO_4$$}$$

Question 16

Which of the following ions is responsible for the green color in copper(II) compounds?

Accepted Answer

Cu$$^{2+}$$

Question 17

Which of the following ions is present in the compound ammonium nitrate, commonly used in fertilizers?

Accepted Answer

NH$$_4^{+}$$ and NO$$_3^{-}$$

Question 18

Which of the following ions is a 1+ cation?

Accepted Answer

Ag$$^{+}$$

Question 19

A patient is given a solution containing HPO$$_4^{2-}. $$What is the name of this ion?

Accepted Answer

Hydrogen phosphate

Common Ions in Anatomy & Physiology: Cations and Anions Reference Table

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