[Undergrad1234]

Hey guys!

I'm reviewing for my general chemistry 2 test and there are a few problems that I cannot seem to figure out. Any type of help to get me going in the right direction would be great!

1) 50.0 mL of a solution of KI is reacted with 100.0 mL of .0530 M AgNO3 causing the precipitation of yellow silver (I) iodide. The yellow solid is filtered off, and the unreacted silver is titrated to the endpoint (detected colorimetrically with Fe^2+) with 14.8 mL of 0.132 M KSCN (to form AgSCN). What is the concentration of KI in the original 50.0 mL solution?

2)HOCL is a monoprotic acid whose Ka is 3.0*10^-8.
    a) What is the pH of 30 mL of .600 M HOCl?
    b) If the solution in part (a) is titrated with .400 M KOH, what is the pH at the             3/4 equivalence point? This is defined as adding 3/4 of the volume to get to the full equivalence point.
    c)If the titration in part (b) is continued to the full equivalence point, what is the pH at the full equivalence point?

3) Molecules A, B and C react to form products D and E. Experimentally, the reaction is found to be fourth order overall. In one separate experiment, it is found that when the concentration of A is doubles and the concentration of B is halved, the rate increases by a factor of 2. In another experiment, it is found that if the concentration of B is doubled and the concentration of C is halved, the rate stays the same. What is the order of each reactant?

[Hunter2]

Where is your own attempt. It is not a home work forum. Show what you already could calculate then you will get also help. Only posting some exercises, nobody will solve for you. And even somebody does the admin will erase the given answer.