Balancing redox reactions by the half-reaction method?
hi, i am having trouble balancing redox reactions using the half-reaction method. I have the following question: Balance the follwoing oxidation-reduction reaction in acid solution: SO32- + MnO4- -> SO42- + Mn2+ + H2O I came up with the following answer: 6H+ + 5SO32- + 2MnO4- -> 5SO42- + 2Mn2+ +3H2O i dont know if this is right or not, but can someone please help me by giving me a step by step on what to do. What would i do if it was in an aqueous solution of a basic solution? thanks a lot for any help
Numerical Methods...boundary value problem with shooting method????
I have a Numerical Methods final tomorrow, and I'm having trouble figuring out one of the problems. It's going to be a Boundary-Value problem, 2nd order equation. It needs to be changed into two 1st order equations, with starting values given, and we have to calculate one point. Then, with 3 boundary conditions, and the results of 2 guesses given, we're going to have to derive the shooting method with taylor series, and use that to calculate the next guess. I need some help please! anything would be great. Thanks!
REDOX REACTIONS HALF-REDUCTION METHOD QUESTIONS HELP?
I'm going to assume you know how to balance redox reactions because you had to do 75 and are only asking about 3, so... I tried 1 and 2 and they did not balance...but I did 3 and it balanced so here is my answer 17H ^+ + 14NO3 ^- + 3FeAsS ----> 3Fe ^3+ +3SO4 ^2- + 3H3AsO4 + 14NO +4H2O I broke up the reaction into FeAsS ---> Fe ^3+ + 3SO4 ^2- + H3AsO4 and NO3 ^- ---> NO For the Nitrogen reaction I added two water to the products and 4 H+ and 3e- to the reactants For the Iron reaction I added 8 water to the reactants, and 13H+ and 14e- to the products I multiplied them by 14 adn 3 respectively. Hydrogen was reduced to the reactants, water was reduced to the products and the e- canceled out.
What are some methods proven to reduce or completely stop snoring?
Let’s face it. Loud snoring is annoying for those with in ear shot.This is especially true if they’re trying to sleep themselves.But snoring can also be a very loud danger-signal pointing to a more serious sleep disorder like sleep apnea.What makes sleep apnea so dangerous?For one thing, sleep apnea can cause a steep drop in your body’s oxygen levels, which has been linked to conditions like:impotence,loss of concentration,poor memory,diabetes,hypertension; and even:night time heart attacksFirst things first:If you or someone you love snores a lot - please have them take this free Sleep Apnea Screening Questionnaire.It can be filled out fast and it may save their life.If the screening suggests that there may be a problem, make sure they get to their family Dr. asap.Here’s the Sleep Apnea Screening Link:Sleep Apnea Stop Bang Questionnaires | American Sleep AssocOnce a more serious sleep disorder is ruled out, there are a number of tips and strategies you can try that may really help to reduce or even stop snoring.Suggestions like sleeping on your left side, eating a healthy diet and getting Dr. permitted moderate exercise are great strategies you can adopt as part of building a truly great sleep habit into your daily routine.You can also try these snore-proofing exercises as well:The simple workout that will stop you snoring and improve your sleepAgain, If simple over the counter remedies, exercises or even learning the didgeridoo (see infographic) don’t work for you:Get to your family Dr. fast to rule out a sleep disorder.There are some highly effective medical treatments available if you do have one.Checkout this great infographic I found for you. It has some excellent tips to help you or a loved one stop snoring, including:identifying the type of snoring they suffer from,using nasal strips to open up the nasal passage for nasal snoring and,using chin-up strips to help fight snoring from excessive sleep mouth breathing.Important Note: Always get the ok from your family Dr. before starting any new diet, exercise, health or wellness strategy.Now here’s the Stop Snoring Infograhic I promised you. It’s from Dreams.co:
Mg+Hg2 --> Mg2+ Hg2 Using the "half reaction" balance the oxidation-reduction reactions.?
First identify what's being oxidized in reduced. Here, Mg --> Mg+2 is being oxidized, and Hg+2 --> Hg+1 is being reduced. Add electrons to balance the half rxns Mg --> Mg+2 + 2e- Hg+2 + e- --> Hg+1 then multiply each by an integer and combine them so that the number of electrons are the same on both sides of the resulting equation: 1 x [ Mg --> Mg+2 + 2e- ] 2 x [ Hg+2 + e- --> Hg+1 ] - - - - - - - - - - - - - - - - - - - - Mg + 2 Hg+2 + 2e- --> Mg+2 + 2e- + 2 Hg+1 + 2e- (You don't have to keep the electrons in the equation, but you'll have to know how many are involved in the rxn to calculate rxn energy.) Now add H+ and H2O to balance the H's and O's in acidic solution - oops, there's nothing to do for this step! Done. b) Bromine is being oxidized (Br-1 --> Br+0) and nitrogen is being oxidized (N-1 --> N+2). It doesn't seem likely to react. Did you mean (NO3)- + Br- --> NO + Br2 ? In this case nitrogen is being reduced (N+5 --> N+2). Write and balance the half rxns: Br- --> 1/2 Br2 + e- (NO3)- + 3e- --> NO combine them 3 * [ Br- --> 1/2 Br2 + e- ] 1 * [ (NO3)- + 3e- --> NO ] - - - - - - - - - - - - - - - - - - - - - - - - 3 Br- + (NO3)- + 3e- --> 3/2 Br2 + 3e- + NO Add H2O to balance the oxygens 3 Br- + (NO3)- + 3e- --> 3/2 Br2 + 3e- + NO + 2 H2O and H+ to balance the hydrogen 3 Br- + (NO3)- + 3e- + 4 H+ --> 3/2 Br2 + 3e- + NO + 2 H2O Charge and mass should now balance. m
What are some methods to prevent police corruption?
Police corruption seems to be an increasing problem in the United States as well as most of the world. With higher reports of police brutality, racial profiling by police, and plain system abuses, many people have a growing distrust of the police and their methods. In your opinion, what are some methods that can reduce and even prevent corruption? A reward based "tattle tale" system sometimes works as it rewards officers for reporting others, but many police officers seem to "stick together" preventing this from working effectively. What are other methods that could help? What are you thoughts in general about police corruption? Have you directly been affected by it?
Reduced Power. For xy''-y'+4x(^3)y=0 y(1)=sinx^2?
Your second derivative is not correct. y = v sin(x^2) y' = v' sin(x^2) + 2xv cos(x^2) y'' = [v'' sin(x^2) + 2xv' cos(x^2)] + [2v cos(x^2) + 2xv' cos(x^2) - 4x^2 v sin(x^2)] ....= v'' sin(x^2) + 4xv' cos(x^2) + 2v cos(x^2) - 4x^2 v sin(x^2) --------------- Substituting this into the DE yields x(v'' sin(x^2) + 4xv' cos(x^2) + 2v cos(x^2) - 4x^2 v sin(x^2)) - (v' sin(x^2) + 2xv cos(x^2)) + 4x^3 * (v sin(x^2)) = 0 Simplifying: xv'' sin(x^2) + (4x^2 cos(x^2) - sin(x^2)) v' = 0 ==> xv'' sin(x^2) = (sin(x^2) - 4x^2 cos(x^2)) v' Separating variables: v''/v' = (sin(x^2) - 4x^2 cos(x^2)) / (x sin(x^2)) ......= 1/x - 4x cot(x^2). Integrate both sides: ln(v') = ln(x) - 2 ln(sin(x^2)) + A ........= ln(x / sin^2(x^2)) + A So, v' = Bx / sin^2(x^2), where B = e^A. .........= Bx csc^2(x^2). Integrate both sides again: v = (-B/2) cot(x^2) + C Since y = v sin(x^2), we see that y = (-B/2) cos(x^2) + C sin(x^2). Relabeling constants: y = C₁ cos(x^2) + C₂ sin(x^2). I hope this helps!
Is there a way to effectively reduce the size/hardness of stool?
Yes, the bowels you described are common. But I understand the need to relieve the discomfort. You need more fiber in your diet. Fiber helps break down the foods you eat. The more junk food you eat, the more fiber you will need. Try eating mini wheats, cheerios, or oatmeal, maybe not every day, but at least once a week. Basically, anything with whole grains has fiber in it. Also, drink more water. Alot of people don't drink enough and that can have an effect on your stool as well. If you are feeling constipated, try some chocolate for temporary relief. Castor oil works well too. Just don't take those kind of laxatives too much, or you will end up malnourished.