Chemistry Ionic Compound Quiz

Explanation
The correct answer is CO3-2 because carbonate is a polyatomic ion with a charge of -2. The formula CO3-2 represents one carbon atom bonded to three oxygen atoms, and the -2 charge indicates that two electrons have been gained to achieve a stable electron configuration.

Explanation
The correct answer is So4-2 because sulfate is represented by the chemical formula SO4-2. The "-2" indicates that the sulfate ion has a charge of -2, meaning it has gained two electrons.

Explanation
Thiosulfate is represented by the chemical formula S2O3-2. The -2 subscript indicates that there are two extra electrons in the thiosulfate ion, giving it a negative charge. Thiosulfate is composed of two sulfur atoms and three oxygen atoms. It is commonly used in photography as a fixing agent to remove unexposed silver halide from photographic film and paper. Thiosulfate also has various other applications in industries such as textile, mining, and water treatment.

Explanation
The given answer, PO4-3, represents the phosphate ion. The phosphate ion has a charge of -3, indicated by the superscript -3. It consists of one phosphorus atom (P) bonded to four oxygen atoms (O), forming a tetrahedral shape. The phosphate ion is commonly found in biological systems and plays a crucial role in various cellular processes, such as energy transfer, DNA and RNA synthesis, and cell signaling.

Explanation
The given answer, AsO4-3, represents the chemical formula for arsenate. Arsenate is an anion that consists of one arsenic atom bonded to four oxygen atoms. The -3 charge on the ion indicates that it has gained three extra electrons to achieve a stable electronic configuration. This chemical species is commonly found in arsenic-containing compounds and plays a role in various biological and environmental processes.

Explanation
The given answer, Cr2O7-2, is the chemical formula for dichromate ion. Dichromate ion consists of two chromium atoms (Cr) and seven oxygen atoms (O), with a charge of -2. It is commonly found in various compounds and is known for its bright orange color. Dichromate ion is a strong oxidizing agent and is often used in industrial processes and laboratory experiments.

Explanation
Permanganate is a compound composed of manganese (Mn) and oxygen (O). The chemical formula for permanganate is MnO₄⁻, where the manganese atom is in the +7 oxidation state. However, in the given answer, the chemical formula is written as MnO-, which is incorrect. The correct formula for permanganate should have four oxygen atoms, not just one.

Explanation
The given correct answer, C2H3O2-, represents the acetate ion. Acetate is a negatively charged polyatomic ion that is derived from acetic acid. It consists of two carbon atoms, three hydrogen atoms, and two oxygen atoms. The formula C2H3O2- indicates that there are two carbon atoms, three hydrogen atoms, and two oxygen atoms in the acetate ion, with a negative charge of -1. Acetate ions are commonly found in various chemical compounds and are important in many biological processes.

Explanation
Iodate (IO3-) is a polyatomic ion that consists of one iodine atom bonded to three oxygen atoms. The negative charge on the ion indicates that it has gained an extra electron to achieve stability. Iodate is commonly found in compounds such as potassium iodate (KIO3) and sodium iodate (NaIO3), which are used in various applications including as oxidizing agents and in the production of iodine supplements.

Explanation
The answer OH- is correct because hydroxide refers to an anion with a chemical formula of OH-. It consists of one oxygen atom bonded to one hydrogen atom, carrying a negative charge. The hydroxide ion is commonly found in various chemical compounds and is known for its basic properties.

Explanation
Hypochlorite is represented by the chemical formula ClO-. The "- " sign indicates that it carries a negative charge, meaning it has gained an extra electron. This ion is commonly found in bleach and is responsible for its disinfecting properties.

Explanation
The correct answer is So3-2 because Sulfite is a polyatomic ion with a charge of -2. The chemical formula for sulfite is SO3-2, indicating that it consists of one sulfur atom bonded to three oxygen atoms and has an overall charge of -2.

Explanation
Nitrite is an ion with the chemical formula NO2-. It consists of one nitrogen atom bonded to two oxygen atoms and carries a negative charge. Nitrite is commonly found in the environment and is produced by various natural and human activities. It is used in industrial processes, as a food preservative, and can also be found in fertilizers. Nitrite is known for its ability to react with other compounds and is often involved in chemical reactions related to oxidation and reduction.

Explanation
Nitrate (NO3-) is a polyatomic ion that consists of one nitrogen atom bonded to three oxygen atoms. It carries a negative charge due to the extra electron. Nitrate is commonly found in fertilizers and is an essential nutrient for plants. It can also be found in groundwater and can be converted into harmful nitrites by bacteria, which can be toxic to humans and animals.

Explanation
Bromate (BrO3-) is an ion that consists of a bromine atom bonded to three oxygen atoms. The negative charge on the ion indicates that it has gained an extra electron, making it negatively charged. Bromate is a strong oxidizing agent and is commonly used in various industrial processes. It is also found naturally in small amounts in the environment.

Explanation
Chromate, represented by the chemical formula CrO4-2, is an anion that consists of one chromium atom bonded with four oxygen atoms. The "-2" superscript indicates that the chromate ion has a charge of -2, meaning it has gained two extra electrons. This charge is balanced by the presence of two extra protons in the nucleus of the chromium atom. Chromate ions are commonly found in various chemical compounds and play a role in many industrial processes.

Explanation
Dihydrogen phosphate is represented by the chemical formula H2PO4-. In this compound, there are two hydrogen atoms (H) bonded to a phosphate ion (PO4-). The negative charge on the phosphate ion indicates that it has gained an extra electron, resulting in a negatively charged ion. The formula H2PO4- represents the dihydrogen phosphate ion, which is commonly found in various chemical compounds and is an important component in many biological processes.

Explanation
Chlorate (ClO3-) is a polyatomic ion that consists of one chlorine atom bonded to three oxygen atoms. The -3 charge on the ion indicates that it has gained three electrons to achieve a stable electron configuration. Chlorate ions are commonly found in compounds such as potassium chlorate (KClO3) and sodium chlorate (NaClO3). These compounds are often used as oxidizing agents, as the chlorate ion can easily donate oxygen atoms to other substances.

Explanation
Chlorite is an anion with the chemical formula ClO2-. The negative charge on the ion indicates that it has gained one electron. Chlorite is a highly reactive compound and is commonly used as a disinfectant and bleaching agent. It is also used in the production of paper and textiles. The correct answer, ClO2-, represents the chlorite ion, which is formed when chlorine dioxide gains an electron.

Explanation
The correct answer is HSO4- because it represents the hydrogen sulfate ion. The HSO4- ion consists of one hydrogen atom bonded to a polyatomic ion called sulfate, which is composed of one sulfur atom and four oxygen atoms. The negative charge on the ion indicates that it has gained an extra electron, giving it a total of 8 valence electrons. This ion is commonly found in acidic solutions and is an important component in many chemical reactions.

Explanation
Cyanide is represented by the chemical formula CN-. The CN- ion consists of one carbon atom bonded to one nitrogen atom, with a negative charge. Cyanide is a highly toxic compound that can interfere with the body's ability to use oxygen, leading to severe health effects and even death. The presence of the negative charge on the CN- ion indicates that it has gained an extra electron, making it negatively charged.

Explanation
The given answer NH4+ is correct because ammonium is a polyatomic ion with a positive charge of +1. It consists of one nitrogen atom (N) bonded to four hydrogen atoms (H), resulting in the formula NH4+. This ion is commonly found in various compounds and is often used in fertilizers and as a source of nitrogen in biological systems.

Explanation
Hydrogen phosphate (HPO4-2) is the correct answer because it is the chemical formula for the hydrogen phosphate ion. The -2 charge indicates that the ion has gained two electrons, making it negatively charged. Hydrogen phosphate is an important compound in chemistry and biochemistry, often found in various salts and as a component of DNA and RNA. It plays a crucial role in maintaining the pH balance in biological systems and is involved in many biochemical reactions.

Explanation
Perchlorate (CLO4-) is a polyatomic ion composed of one chlorine atom bonded to four oxygen atoms. It has a negative charge, indicated by the "-". Perchlorate is a strong oxidizing agent and is commonly used in rocket propellants, fireworks, and explosives. It can also be found naturally in some soils and groundwater. The correct answer is CLO4- because it represents the chemical formula and charge of the perchlorate ion.

Explanation
Hydrogen carbonate, also known as bicarbonate, is represented by the chemical formula HCO3-. It is a negatively charged ion that consists of one hydrogen atom, one carbon atom, and three oxygen atoms. The hydrogen carbonate ion is commonly found in various substances, such as baking soda and antacids. It plays a crucial role in regulating the pH levels in the human body, acting as a buffer to maintain the acid-base balance. Furthermore, hydrogen carbonate is involved in many biological processes, including respiration and digestion.