Consider the titration of a 50 ml sample of 0.235 m c h nh, with 0.205 m hci. determine each quantity. the k, for methylamine is 5.6 x 10-5. a. calculate the volume of added acid that is required to reach equivalence point. (hint: what equals what at the equivalence point? ) b. the initial ph of c, h-nh, c. calculate the ph after adding 5.0 ml of hci. (hint: what kind of solution have you made? what equation can you use to calculate the ph? ) d. the ph at one-half of the equivalence point. (hint: what equals what at one-half the equivalence point? ) e. the ph at the equivalence point f. the ph after adding 60 ml of hci g. sketch the titration curve. include labels for equivalence point, pk ,buffer region, and where there is excess h+.

Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

What are the 4 phases of matter in order of increasing engery content?