Miaow

At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.56. What is the Ksp of the compound at 22 °C? I have found my [OH-] concentration (3.63x10^-4) but I'm not sure I'm...

Consider the decomposition of a metal oxide to its elements, where M represents a generic metal: M2O3 (s) <=> 2M (s) + 3/2 O2 (g) Given a delta Gf: -770 Kj for the M2O3 0 Kj for the M 0 Kj for the O2 What is the standard change in Gibbs energy for the rea...

Please check a Nernst equation for me? Calculate the cell potential for the following reaction as written at 61 °C, given that [Zn2 ] = 0.800 M and [Fe2 ] = 0.0170 M. Half reactions: Zn-->Zn^2+ + 2e^- (potential= -0.76)(anode) Fe^2+ + 2e^- -->Fe (potentia...

Stuck again... "Determine the charge on the complex: diaquadichloroethylenediaminecobalt(III)" I'm having problems even writing a formula for this one! Is it [Co(2)(NH2CH2CH2NH2)Cl]Cl ??? Maybe if I could figure out the formula I'd be better at figuring o...

Working on a practice question for finals so I really want to understand how this works: What is the coordination number of mercury in K2[HgI4]? I say that mercury's coordination number is 4 because I^- is a monodentate ligand. Does the potassium affect t...

Got another practice question but I'm really stumped on this one: If the [ZnCl4]^2- ion is diamagnetic what must its structure be and why - octahedral, tetrahedral or square planar? I know that diamagnetic means that all its electrons are paired and that...

More finals review please... Ag^+ + 2e^- --> Ag E^nought = 0.800V Sn^4+ + 2e^- --> SN^2+ E^nought + 0.154V balanced equation: 2Ag^+ + Sn^4+ --> 2Ag + Sn^2+ E^nought cell = cathode - anode I thought I heard say that I had to flip the "less negative" half r...

Could someone please review my answers and tell me if I am on the right track? Thank you! A student drove to the university from her home and noted that the odometer reading of her car increased by 12.0 km. The trip took 18.0 min. (a) What was her average...

Could someone please check another one of my answer for me? Thank you! A commuter backs her car out of her garage with an acceleration of 1.40 m/s2. (a) How long does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, w...

Oh geez, thank you SO much! And so quick!

Thank you VERY much!

Doesn't make sense to me either but I can't figure it out :( The way I arrived at that answer was: E=[.32-(8.3145x334.15)/(2x96285)]3.851 E=[.32-(2778.29)/192570)]3.851 E=(.32-.014427)3.851 E=(.305573)3.851 E=1.177 It's not right but for the life of me I...

That was it! Apparently it has been WAY too long since I did order of operations but I have refreshed myself now. I should have known better! Thank you for your help.

YAY! Thanks, that was a tough one. Formula didn't matter so much as figuring out the charge. +1 was it! You were a wonderful help, as always!

Thanks so much :)

Thank you again, I really hope you are going to be around this summer for Organic :)

That's okay, I'm sure you're better at it than I am. And you are good at leading me in the right direction; I appreciate that. It'll all work out.

P.S. I have heard that you are either a Gen Chemist or an Organic Chemist. (I am hoping to heck I am an organic chemist! But, I did well in Gen Chem, thanks in part to you.)

I HAD to have actually heard "flip the less positive" didn't I? When I work it that way it seems to make sense.

Thank you for explaining! I think the balancing bit is my fault. I am getting tired and stupid. Time to go to bed and look at this closer in the morning. I thank you for all your help this semester.

Thank you very much! I wondered if I should switch to km/hr. And, I was SURE I was wrong on B but AMAZED I was right on C. :)