Which more concentrated 5grams of salt in 10 grams of water or 18 grams of salt in 90 grams of water?
5 grams of salt in 10 grams of water is more concentrated (50%) compared to 18 grams of salt in 90 grams of water (20%).
Does water tend to diffuse from a region where it is less concentrated to a region where it is highly concentrated?
Tricky question. Are you talking about the concentration of salt in the water or the concentration of water in the salt? It is unusual to talk about the concentration of water unless it is dissolved in another solvent like alcohol. Pure water has a constant concentration of 55.6 mol/dm3. Water is more concentrated without salt in it.
Adding more solute to a solution will increase its concentration. Adding more solvent will only dilute it. Think of salt water. The salt is the solute, and water is the solvent. Add salt and it becomes a more concentrated solution. Add more water, and it is more dilute. Simple and easy once you think it through.
Which is more concentrated solution a 18g of salt in 6L of H2O or solution b 24g of salt in 12L of H2O?
The chloride ions have made the mucus more concentrated of the ions. The water moves from a high concentration of water in the cells to a low concentration of water which is in the mucus; in order to dilute the more concentrated solution. It travels by osmosis through a partially permeable membrane.
A sponge gets its oxygen from the water. The oxygen moves from the water to the sponge by a process called diffusion. Diffusion is when molecules of a substance move from an area where they are highly concentrated (where there are a lot of oxygen molecules) to an area where they are less concentrated (where there are not a lot of oxygen molecules). Oxygen is more highly concentrated in the water then in the sponge…