Please help, I'm behind on school work and I don't understand this very way. I'd rlly appreciate help
Coffee is a solution containing caffeine, acids, alkaloids, water, phenols, and many other chemicals. The solvent in the coffee solution is (1) __________ and the rest of the chemicals dissolved in the solvent are called (2)_________.
3. What is the difference between a saturated solution and a supersaturated solution?
4. Is the following molecule, polar or nonpolar?
5. 12 eggs can be referred to as one dozen eggs.
______________ particles can be referred to as one mole of particles.
6.
The pH of a strong acid might be _____ while the pH of a strong base might be _____
The pH of pure water is _____.
7. What would be the pH of .002 moles of HNO3 dissolved in 2 L of water?
8. A base has a pH of 8.5. What is the concentration of OH- ions in the solution?
I don't want to do all of your work for you but if you will identify a problem and tell me what you don't understand about it I'll be glad to walk you through it. And I'll do each of them with you. I want you to learn it; i.e., not copy it.
the problem is I havent been able to learn it
did you figure out the answer????
Sure, I'd be happy to help you with your schoolwork. Let's go through each question one by one.
1. The solvent in the coffee solution is usually water. Coffee beans are brewed with water, which acts as the solvent to extract the various chemical components from the beans.
2. The rest of the chemicals dissolved in the solvent are collectively called solutes. In this case, the solutes in coffee include caffeine, acids, alkaloids, phenols, and other chemicals.
3. The difference between a saturated solution and a supersaturated solution lies in the concentration of solute that the solvent can hold. In a saturated solution, the solvent has dissolved the maximum amount of solute it can hold at a particular temperature. Any additional solute added will not dissolve. In contrast, a supersaturated solution is a solution that contains more dissolved solute than a saturated solution can normally hold at that temperature. Supersaturation is achieved by initially dissolving the solute at a higher temperature and then cooling the solution, allowing more solute to remain in the solution than would typically be possible.
4. To determine if a molecule is polar or nonpolar, you need to consider the molecular geometry and the electronegativity values of the atoms involved. If the molecule has a symmetrical arrangement of polar bonds or has a linear shape, it is usually nonpolar. On the other hand, if the molecule has an asymmetrical arrangement of polar bonds or has a bent or trigonal pyramidal shape, it is likely to be polar. I would need more information about the specific molecule to give you a definitive answer.
5. In chemistry, the term "dozen" refers to a quantity of 12. For example, 12 eggs can be referred to as one dozen eggs. Similarly, "moles" is a unit used in chemistry to represent a specific quantity of particles, such as atoms, molecules, or ions. One mole of particles corresponds to 6.022 x 10^23 particles. So, the answer to the question would be "One mole of particles can be referred to as one mole of particles."
6. The pH scale measures the acidity or alkalinity of a substance. A strong acid typically has a pH value below 3, indicating a high concentration of hydrogen ions (H+). A strong base, on the other hand, often has a pH value above 11, indicating a high concentration of hydroxide ions (OH-). The pH of pure water is 7, indicating a neutral solution.
7. To determine the pH of a solution, you need to know the concentration of hydrogen ions (H+) in the solution. Given that you have 0.002 moles of HNO3 dissolved in 2 L of water, you can calculate the molarity of the solution by dividing the number of moles by the volume in liters (0.002 moles / 2 L = 0.001 M). Since HNO3 is a strong acid, it dissociates completely in water, meaning that every mole of HNO3 yields one mole of H+. Therefore, the concentration of H+ ions in the solution is also 0.001 M. Using the formula -log[H+], you can find the pH, which in this case is 3 (pH = -log[0.001]).
8. To determine the concentration of hydroxide ions (OH-) in a solution, you can use the fact that the concentration of OH- is equal to the concentration of hydrogen ions (H+) in a neutral solution. Since the pH of the base is 8.5, you can calculate the concentration of H+ using the formula 10^(-pH). In this case, the concentration of H+ is approximately 3.16 x 10^(-9) M. Therefore, the concentration of OH- ions in the solution is also 3.16 x 10^(-9) M.
I hope this helps! Let me know if you have any further questions or if there's anything else I can assist you with.