Science 9,Q2-M2
CHEMICAL BONDING
WHAT'S NEW ACTIVITY 7:TEST ME
PART III
Answer:
Answer【Explanation】:
1. To answer these questions, we need to understand the properties of different types of compounds and their behavior in water.
a. Compounds that dissolve easily in water are typically ionic or polar covalent. Ionic compounds, like salt (sodium chloride), dissociate into ions in water, which makes them soluble. Polar covalent compounds, like sugar (sucrose), dissolve because water molecules can surround and interact with the polar molecules.
b. Compounds that conduct electricity in solution are those that dissociate into ions in water. These are generally ionic compounds. When ionic compounds dissolve in water, they release ions that move freely in the solution, allowing it to conduct electricity.
c. The ease of melting depends on the strength of the forces holding the compound together. Ionic compounds typically have high melting points due to the strong electrostatic forces between the ions. Covalent compounds can have a range of melting points depending on the strength of the intermolecular forces.
2. Electricity can pass through solutions that contain free ions. In this case, it would be the solution of an ionic compound that dissociates in water.
3. General properties of ionic and covalent compounds:
- Ionic compounds are made up of ions and are held together by strong electrostatic forces. They usually have high melting and boiling points, are soluble in water, and conduct electricity when dissolved in water or melted.
- Covalent compounds are made up of molecules held together by shared electrons. Their melting and boiling points can vary widely, but they are generally lower than those of ionic compounds. They are often insoluble in water and do not conduct electricity in solution because they do not form ions.
【Answer】:
1. a. Salt and Vetsin. These are ionic compounds.
b. Salt and Vetsin. These are ionic compounds.
c. Sugar and Candle Wax. These are covalent compounds.
2. In the solution of Salt and Vetsin.
3. Ionic compounds have high melting and boiling points, are soluble in water, and conduct electricity when dissolved. Covalent compounds have a range of melting and boiling points, are often insoluble in water, and do not conduct electricity in solution.