Dilution question in many of the experiments, you will be asked to prepare a standard solution by diluting a stock solution. you will be specifically asked how you will do the dilution steps during the review before you start work. here is a homework question to get you to think about this process. you have a 1000 ug/ml stock solution of lead (pb2+). describe how you would prepare a 100 ppb standard solution from this stock solution. rules: no single dilution step can be greater than 1: 50 you have 25.00 ml volumetric flasks and 10.00 ml volumetric flasks. you have access to three pipet dispensers. one dispenser delivers between 1 and 5 ml, the second dispenser delivers between 100 and 1000 , and the third dispenser delivers between 20 and 200 hl

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. true false

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance