2. properties of bases
a. bases have a ph value greater
b. bases feel .
c. bases are good cleaners and will react with
d. litmus turns in the presence of a basic solution.
e. phenolphthalein turns in the presence of a basic solution

3. definitions of acids and bases
a. the formula for an acid will always contain:

b. the formula for a base will usually contain:

c. what is the formula for the base, barium hydroxide? which ions are produced when barium hydroxide dissociates in water?

d. what is the formula for phosphoric acid? which ions are produced when phosphoric acid dissociates in water?

e. which part of hydrochloric acid, hcl, is the acidic part?

f. which part of sodium hydroxide, naoh, is the basic part?

g. write a balanced equation for the neutralization reaction that occurs when potassium hydroxide and hydrobromic acid are mixed. include state symbols.

ph and poh

ph is an indication of how acidic or basic a solution is.
ph = -log[h+].
a logarithm (log) is just the exponent to which ten (10x) is raised to obtain a given value.
for example if [h+] = 1.0x10-5, then the log of 1.0x10-5 = -5 and the ph would be 5.
it is easier to find the poh for a base and then to convert to ph. the following formulas will .
poh = -log[oh-].
ph + poh = 14
[h+][oh-] = 10-14

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

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

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation