Ionic Compounds and Their Formulas Quiz

Chemistry

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Quizzes Created: 7387 | Total Attempts: 9,527,791

| Attempts: 15 | Questions: 28 | Updated: Aug 4, 2025

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1. What is the chemical formula for Acetate?

NaCl

C2H3O2-

H2O

CO2

Acetate is a polyatomic anion with a chemical formula of C2H3O2-. It is derived from acetic acid and commonly found in various chemical compounds.

Explanation

Acetate is a polyatomic anion with a chemical formula of C2H3O2-. It is derived from acetic acid and commonly found in various chemical compounds.

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About This Quiz

Explore the intriguing world of negative ions with our focused quiz designed to enhance your understanding of ionic charges and their applications. This quiz assesses your knowledge on the properties and significance of negative ions, crucial for students and professionals in chemistry.

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2. What is the chemical symbol for Bromide?

Bro

Br -

The correct chemical symbol for Bromide is Br-, representing the bromide ion with a negative charge.

Explanation

The correct chemical symbol for Bromide is Br-, representing the bromide ion with a negative charge.

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3. What is the chemical formula for chlorate?

ClO

ClO2

ClO3-

ClO4

Chlorate is a polyatomic ion with a -1 charge, consisting of one chlorine atom and three oxygen atoms.

Explanation

Chlorate is a polyatomic ion with a -1 charge, consisting of one chlorine atom and three oxygen atoms.

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4. What is the chemical symbol for chloride?

Cl-

Cl+

Chloride is commonly represented by the chemical symbol Cl- as it gains an electron to attain a stable configuration.

Explanation

Chloride is commonly represented by the chemical symbol Cl- as it gains an electron to attain a stable configuration.

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5. What is the chemical formula for dichromate?

Cr2O3

CrO4^2-

CrO3

Cr2O72-

Dichromate is a polyatomic ion with the chemical formula Cr2O72-. The incorrect answers provided do not represent the correct formula for dichromate.

Explanation

Dichromate is a polyatomic ion with the chemical formula Cr2O72-. The incorrect answers provided do not represent the correct formula for dichromate.

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6. What is the chemical symbol for Fluoride?

F-

Fluoride is represented by the chemical symbol F- in chemistry.

Explanation

Fluoride is represented by the chemical symbol F- in chemistry.

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7. What is the chemical formula for hydroxide?

OH-

CO2

H2O

NaCl

Hydroxide is a negatively charged polyatomic ion consisting of one oxygen atom and one hydrogen atom. Its chemical formula is OH-.

Explanation

Hydroxide is a negatively charged polyatomic ion consisting of one oxygen atom and one hydrogen atom. Its chemical formula is OH-.

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8. What is the chemical symbol for Iodide?

I-

I+

The correct chemical symbol for Iodide is I-. It represents an iodide ion with a negative charge, indicating the presence of an extra electron.

Explanation

The correct chemical symbol for Iodide is I-. It represents an iodide ion with a negative charge, indicating the presence of an extra electron.

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9. What is the chemical formula for nitrate?

H2O

SO4

CO2

NO3-

Nitrate is a polyatomic ion composed of one nitrogen atom and three oxygen atoms, carrying a negative one charge.

Explanation

Nitrate is a polyatomic ion composed of one nitrogen atom and three oxygen atoms, carrying a negative one charge.

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10. What is the chemical formula for Perchlorate?

CO3-2

NaCl

ClO4-

H2O

Perchlorate is a polyatomic ion composed of one chlorine atom and four oxygen atoms with a single negative charge, represented by ClO4-.

Explanation

Perchlorate is a polyatomic ion composed of one chlorine atom and four oxygen atoms with a single negative charge, represented by ClO4-.

Submit

11. What is the chemical formula for permanganate?

MnO3-

Mn2O7

MnO4-

MnO2

The correct chemical formula for permanganate is MnO4-. Permanganate is an anion with a -1 charge, and its formula reflects this by combining one manganese (Mn) atom with four oxygen (O) atoms.

Explanation

The correct chemical formula for permanganate is MnO4-. Permanganate is an anion with a -1 charge, and its formula reflects this by combining one manganese (Mn) atom with four oxygen (O) atoms.

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12. What is the chemical formula for Phosphate?

PH4+

PR3+

PO32-

PO43-

Phosphate is a polyatomic ion composed of one phosphorus atom bonded to four oxygen atoms, carrying a negative three charge (PO43-). The incorrect answers provided do not accurately represent the chemical formula for Phosphate.

Explanation

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13. What is the chemical formula for sulfite?

SO42-

SO32-

S2O32-

S2O42-

Sulfite is a polyatomic anion with the chemical formula SO32-. The incorrect answers provided are variations of the sulfite ion with different elemental compositions or charges.

Explanation

Sulfite is a polyatomic anion with the chemical formula SO32-. The incorrect answers provided are variations of the sulfite ion with different elemental compositions or charges.

Submit

14. What is the chemical formula for Hydrogen Sulfite?

HSO2-

H2SO4

HSO3-

HSO4-

Hydrogen Sulfite is represented by the chemical formula HSO3-. It consists of one hydrogen atom, one sulfur atom, and three oxygen atoms with a negative charge.

Explanation

Hydrogen Sulfite is represented by the chemical formula HSO3-. It consists of one hydrogen atom, one sulfur atom, and three oxygen atoms with a negative charge.

Submit

15. What is the chemical formula for Carbonate?

CO32-

CH4

CO2

H2O

Carbonate is a polyatomic ion with a charge of -2 represented by the chemical formula CO3^2-. This ion is commonly found in compounds such as calcium carbonate (CaCO3) and sodium carbonate (Na2CO3).

Explanation

Carbonate is a polyatomic ion with a charge of -2 represented by the chemical formula CO3^2-. This ion is commonly found in compounds such as calcium carbonate (CaCO3) and sodium carbonate (Na2CO3).

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16. What is the chemical formula for nitrite ion?

NH4+

NO2-

NO3-

SO4^2-

Nitrite ion is represented by NO2- with a negative charge. It is different from nitrate ion (NO3-), ammonium ion (NH4+), and sulfate ion (SO4^2-).

Explanation

Nitrite ion is represented by NO2- with a negative charge. It is different from nitrate ion (NO3-), ammonium ion (NH4+), and sulfate ion (SO4^2-).

Submit

17. What is the chemical formula for oxalate?

C4H4O6^2-

CO3^2-

HCO3-

C2O42-

Oxalate is a dianion with the formula C2O42-. It consists of two carbon atoms, four oxygen atoms, and carries a charge of -2.

Explanation

Oxalate is a dianion with the formula C2O42-. It consists of two carbon atoms, four oxygen atoms, and carries a charge of -2.

Submit

18. What is the chemical formula for the oxide ion?

O3-

O2-

O2+

The correct chemical formula for the oxide ion is O2-, representing oxygen with a -2 charge. This is because oxygen typically gains two extra electrons when it forms an ionic bond.

Explanation

The correct chemical formula for the oxide ion is O2-, representing oxygen with a -2 charge. This is because oxygen typically gains two extra electrons when it forms an ionic bond.

Submit

19. What is the chemical formula for chlorite?

ClO3-

ClO4-

ClO

ClO2-

Chlorite has a chemical formula of ClO2- where the chlorine atom is bonded to two oxygen atoms and has a negative charge.

Explanation

Chlorite has a chemical formula of ClO2- where the chlorine atom is bonded to two oxygen atoms and has a negative charge.

Submit

20. What is the chemical formula for Chromate?

CrO42-

Cr2O3

CrO3

CrO

The correct chemical formula for Chromate is CrO42-. Chromate is a polyatomic anion consisting of one chromium atom and four oxygen atoms, each with a -2 charge.

Explanation

The correct chemical formula for Chromate is CrO42-. Chromate is a polyatomic anion consisting of one chromium atom and four oxygen atoms, each with a -2 charge.

Submit

21. What is the chemical formula for Dihydrogen Phosphate?

H3PO4

H2PO4-

PO4^3-

H2O

Dihydrogen Phosphate is an anion with the chemical formula H2PO4-, consisting of two hydrogen atoms, one phosphorus atom, and four oxygen atoms.

Explanation

Dihydrogen Phosphate is an anion with the chemical formula H2PO4-, consisting of two hydrogen atoms, one phosphorus atom, and four oxygen atoms.

Submit

22. What is the chemical formula for Hydrogen Sulfate?

H2SO4

HSO4-

HSO3-

HS2O4

Hydrogen Sulfate is commonly represented as HSO4- in its ionic form. The other options provided do not accurately represent the chemical formula for Hydrogen Sulfate.

Explanation

Hydrogen Sulfate is commonly represented as HSO4- in its ionic form. The other options provided do not accurately represent the chemical formula for Hydrogen Sulfate.

Submit

23. What is the chemical formula for Hydrogen Sulfide?

HS-

SO2

H2S

HSO4

Hydrogen Sulfide is represented by the formula HS- in its ionic form. H2S is the molecular formula for Hydrogen Sulfide, HSO4 is the formula for Bisulfate, and SO2 is the formula for Sulfur Dioxide.

Explanation

Hydrogen Sulfide is represented by the formula HS- in its ionic form. H2S is the molecular formula for Hydrogen Sulfide, HSO4 is the formula for Bisulfate, and SO2 is the formula for Sulfur Dioxide.

Submit

24. What is the chemical formula for Hydrogen Carbonate?

HCO3-

H2O

H2CO3

HC2O4

Hydrogen Carbonate is also known as bicarbonate. Its chemical formula is HCO3-, which consists of one hydrogen atom, one carbon atom, and three oxygen atoms with a negative charge.

Explanation

Hydrogen Carbonate is also known as bicarbonate. Its chemical formula is HCO3-, which consists of one hydrogen atom, one carbon atom, and three oxygen atoms with a negative charge.

Submit

25. What is the chemical formula for hypochlorite?

NaClO

HClO2

CHO

ClO-

The correct chemical formula for hypochlorite is ClO-. It is a negatively charged polyatomic ion consisting of one chlorine atom and one oxygen atom.

Explanation

The correct chemical formula for hypochlorite is ClO-. It is a negatively charged polyatomic ion consisting of one chlorine atom and one oxygen atom.

Submit

26. What is the chemical formula for Hydrogen Oxalate?

H2C2O4

HC2O4-

HCOOH

H2CO3

Hydrogen Oxalate is the salt of oxalic acid, with the formula HC2O4-.

Explanation

Hydrogen Oxalate is the salt of oxalic acid, with the formula HC2O4-.

Submit

27. What is the chemical formula for Monohydrogen Phosphate?

H2O2PO4-

H3PO4

HPO42-

H2PO4-

Monohydrogen Phosphate has the chemical formula HPO42-, indicating one hydrogen atom, one phosphorus atom, and four oxygen atoms with a -2 charge.

Explanation

Monohydrogen Phosphate has the chemical formula HPO42-, indicating one hydrogen atom, one phosphorus atom, and four oxygen atoms with a -2 charge.

Submit

28. What is the chemical formula for sulfate?

SO3-2

SO42-

S2O7-2

SO4-3

Sulfate ion has a chemical formula of SO42- where sulfur is bonded to four oxygen atoms with a -2 charge.

Explanation

Sulfate ion has a chemical formula of SO42- where sulfur is bonded to four oxygen atoms with a -2 charge.

Submit

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All (28)
Unanswered ()
Answered ()

What is the chemical formula for Acetate?

What is the chemical symbol for Bromide?

What is the chemical formula for chlorate?

What is the chemical symbol for chloride?

What is the chemical formula for dichromate?

What is the chemical symbol for Fluoride?

What is the chemical formula for hydroxide?

What is the chemical symbol for Iodide?

What is the chemical formula for nitrate?

What is the chemical formula for Perchlorate?

What is the chemical formula for permanganate?

What is the chemical formula for Phosphate?

What is the chemical formula for sulfite?

What is the chemical formula for Hydrogen Sulfite?

What is the chemical formula for Carbonate?

What is the chemical formula for nitrite ion?

What is the chemical formula for oxalate?

What is the chemical formula for the oxide ion?

What is the chemical formula for chlorite?

What is the chemical formula for Chromate?

What is the chemical formula for Dihydrogen Phosphate?

What is the chemical formula for Hydrogen Sulfate?

What is the chemical formula for Hydrogen Sulfide?

What is the chemical formula for Hydrogen Carbonate?

What is the chemical formula for hypochlorite?

What is the chemical formula for Hydrogen Oxalate?

What is the chemical formula for Monohydrogen Phosphate?

What is the chemical formula for sulfate?