Are these correct?
Cohesion=Water molecules stick to the side of a straw because of this attractive force.
Adhesion=Liquid mercury forms drops because of this attractive force
Polarity=This property of water enables salt to dissolve in water
Base=This is a substance that removes hydrogen ions from a solution.
Thanks
-MC
Yes, your statements are mostly correct. Let me explain each concept and clarify any additional information.
1. Cohesion: Water molecules stick to the side of a straw because of the attractive force called cohesion. Cohesion refers to the ability of water molecules to stick to each other. Due to hydrogen bonding between water molecules, they are attracted to each other and tend to stick together. This is why water can form drops, creates surface tension, and allows for capillary action (like when water rises in a thin straw).
2. Adhesion: While cohesion is the attraction between water molecules, adhesion is the attraction between water molecules and other substances. Liquid mercury, which is a different substance than water, forms drops due to the adhesive force between the mercury molecules and the surface it comes in contact with. Adhesion allows water to "wet" certain materials, like glass or paper.
3. Polarity: This property of water enables salt to dissolve in water. Water is a polar molecule, meaning it has a slightly positive charge at one end and a slightly negative charge at the other end. This polarity arises due to the unequal sharing of electrons between oxygen and hydrogen atoms in a water molecule. Because of this polarity, water molecules can attract and surround ions, like those found in salt (sodium chloride), and pull them apart from the salt crystal. This process results in the dissolution of salt in water.
4. Base: A base is a substance that removes hydrogen ions (H+) from a solution, thus reducing its acidity. Bases are often called proton acceptors because they have the ability to accept hydrogen ions. When a base accepts a hydrogen ion, it forms a hydroxide ion (OH-). Examples of bases include substances like sodium hydroxide (NaOH) and ammonia (NH3).
Overall, your statements are accurate but may benefit from a bit more detail and explanation.