I have a few questions I was wondering if you guys could help me with. You don't need to solve them, I just want a push in the right direction so I can understand them. Any and all help is appreciated!
1. A technician obtained the following results for the concentration (mg/dL) of cholesterol in a blood sample: 240, 252, 242, 238, 239, and 236. The technician re-measured the cholesterol in the same blood sample using a different method. The results were: 233, 231, 222, 235, 239, and 234. At the 95% confidence level is the second method consistently less precise?
I'm pretty certain I need to use a one-tailed F-test for this, but I simply don't know how to do that while comparing with the second method. Any thoughts?
2a. The Ksp
of cerium(III) iodate is 1.4×10-11
. What is the molar solubility of cerium(III) iodate in pure water?
I calculated a value of 0.00085 M
. I'm fairly certain this is correct.
2b. What concentration of sodium iodate in solution would be necessary to reduce the cerium concentration in a saturated solution of cerium(III) iodate by a factor of 10 below that calculated in part a?
I'm not sure where to start with this one. I can't just change the molar solubility by dividing it by 10, substituting it into the Ksp
expression, and solving for [IO3-
]. Any ideas/hints?
3. A solution is prepared by adding 100.00 mL of 0.10 M
AgNO3 to 100.00 mL of 0.12 M
NaCl. (At 25 o
C, the Ksp
for AgCl is 1.8×10-10
.) Calculate the number of milligrams of Ag+
that is not
I flat out don't know where to begin on this one.