Question 1

Which of the following ions has a -2 charge and contains both hydrogen and phosphate?

Accepted Answer

HPO\_$$4^{2-} ($$monohydrogen phosphate)

Question 2

A patient is diagnosed with cyanide poisoning. Which of the following is the correct formula for the cyanide ion?

Accepted Answer

$$CN^{-}$$

Question 3

Which polyatomic ion is commonly found in household bleach and is responsible for its disinfecting properties?

Accepted Answer

$$ClO^{-} ($$hypochlorite)

Question 4

Which of the following ions is a cation?

Accepted Answer

NH\_$$4^{+} ($$ammonium)

Question 5

A solution contains both acetate and ammonium ions. What are their chemical formulas?

Accepted Answer

C\_2H\_3O\_$$2^{-}$$ and NH\_$$4^{+}$$

Question 6

Which of the following ions would be present in a solution of sodium sulfate?

Accepted Answer

SO\_$$4^{2-}$$

Question 7

A chemist needs to prepare a solution containing the most oxidized form of chlorine. Which ion should they use?

Accepted Answer

ClO\_$$4^{-} ($$perchlorate)

Question 8

Which of the following ions is responsible for the fizz in carbonated beverages?

Accepted Answer

HCO\_$$3^{-} ($$bicarbonate)

Question 9

If a compound contains the ion with the formula $$CrO_4$$^{2-}$$, what is its name?

Accepted Answer

Chromate

Question 10

Which ion is present in hydrogen peroxide and is responsible for its oxidizing properties?

Accepted Answer

O\_$$2^{2-} ($$peroxide)

Question 11

A fertilizer contains ammonium phosphate. What is the formula for the phosphate ion in this compound?

Accepted Answer

PO\_$$4^{3-}$$

Question 12

Which of the following ions is commonly used in treating cyanide poisoning due to its ability to oxidize cyanide?

Accepted Answer

MnO\_$$4^{-} ($$permanganate)

Question 13

Which ion is present in vinegar and is responsible for its sour taste?

Accepted Answer

C\_2H\_3O\_$$2^{-} ($$acetate)

Question 14

A water sample is tested and found to contain high levels of nitrate. What is the formula for the nitrate ion?

Accepted Answer

NO\_$$3^{-}$$

Question 15

Which of the following ions is a polyatomic ion with a -1 charge and contains iodine?

Accepted Answer

$$IO^{-} ($$hypoiodite)

Question 16

A compound contains the ion $$CO_3$$^{2-}$$. What is the name of this ion and what is its typical use in antacids?

Accepted Answer

Carbonate; it neutralizes stomach acid

Question 17

Which of the following ions is present in rust removers and is known for its strong oxidizing properties?

Accepted Answer

Cr\_2O\_$$7^{2-} ($$dichromate)

Question 18

Which ion is formed when one less oxygen atom is present compared to the 'ate' form of a polyatomic ion?

Accepted Answer

The 'ite' ion

Question 19

A sample contains both nitrite and nitrate ions. Which formulas correspond to these ions?

Accepted Answer

NO\_$$2^{-}$$ and NO\_$$3^{-}$$

Question 20

Which of the following ions is used in the treatment of hypothyroidism and is essential for thyroid hormone production?

Accepted Answer

$$I^{-} ($$iodide)

Polyatomic Ions and Nomenclature in Introductory Chemistry

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