Number of results: 19,485
Redox Titration questions!
Explain Why an overshot endpoint is not a good titration.?
Wednesday, June 11, 2008 at 9:05pm by keke
Redox Titration questions!
Thank you! Oh, question 4 is fine, I just accidentally copied it with the rest of the questions- it's repeated in this assignment too. Okay, I'll try and get this!
Wednesday, June 11, 2008 at 9:05pm by Angel
chemistry
Usually to accelerate the redox reraction/titration but it isn't necessary for all redox titrations.
Monday, January 12, 2009 at 1:38pm by DrBob222
Chem--PLEASE HELP 911
Here is a site that shows you how to balance redox equations. Repost with specific questions. I can help you through it but you must learn how to do this. http://www.chemteam.info/Redox/Redox.html
Thursday, April 25, 2013 at 12:22pm by DrBob222
chemistry
You need to learn how to balance these redox equations yourself. Here is a site that can help. Also, ask specific questions about what you don't understand and I can help you through it. http://www.chemteam.info/Redox/Redox.html
Friday, November 2, 2012 at 10:49am by DrBob222
chemistry
hello i'm doing a redox stoichiometry lab having to do with titration 6H +5H2O2 + 2MnO4 -- 5O2 + 2Mn2+ + 8H2O Why is H2O2 the source of O2 product in this titration?
Thursday, March 22, 2012 at 10:12pm by Jo
CHEM 1A
You need to learn to do these yourself. Here is a site that covers all aspects of redox equations. If you have specific questions about portions of this you don't understand I can help you through the equations. http://www.chemteam.info/Redox/Redox.html
Sunday, November 4, 2012 at 1:46pm by DrBob222
Redox Titration questions!
Oh goodness, I'm such a pain! I need some help with these! How do I calculate the percentage? How do I start it? 2. Imagine that you ran a similar titration using a different iron sample with 0.02 M KMnO4 as the titrant. Calculate the percent of iron in the sample if the ...
Wednesday, June 11, 2008 at 9:05pm by Angel
chemistry
Can anyone give me a brief explanation about redox? I'm just not understanding any of it. How do you know if a reaction is redox or non redox....how do you know what would be reduced? I am just confused with the redox subject. Any direction?
Monday, October 6, 2008 at 9:38pm by redox
Chemistry
Here is a good site to show you how to do these. Post any specific questions you have. http://www.chemteam.info/Redox/Redox.html
Saturday, April 2, 2011 at 2:50pm by DrBob222
chemistry
That's a chapter or two in a book. Here is reading material. Post specific questions if you still have a problem. http://www.chemteam.info/Redox/Redox.html
Thursday, March 15, 2012 at 3:23pm by DrBob222
chemistry
I don't know how to do this without ending up balancing the equation and you need to learn how to do it yourself. Here is a site that explains all about redox equations. Post back here for specific questions. You need to know the change in oxidation state; for S it is from...
Wednesday, May 16, 2012 at 8:43am by DrBob222
chemistry
MnO4^- + 8H^+ + 5e ==> Mn^2+ + 4H2O Don't memorize these half reactions; there are thousands. Instead, learn how to write them. Here is a site OR ask specific questions about what you may not understand. http://www.chemteam.info/Redox/Redox.html
Thursday, February 23, 2012 at 2:43pm by DrBob222
Chemistry
Redox Titrations I did a redox titration of NaBO3 with KMnO4. I used a .0545 M NaBO3 solution, and an average of .026 L of .01M KMnO4. I have to standardize the KMnO4 solution, does anyone know how to do this?
Wednesday, March 25, 2009 at 8:51pm by Ryan
chemistry
Where do you start? By assigning oxidation numbers to each of the elements to determine which have changed. Here is a hint to get you started. Cr changes from +6 for EACH Cr on the left to +3 on the right. Cu changes from zero on the left to +2 on the right. You need to learn ...
Saturday, November 24, 2012 at 2:46pm by DrBob222
chem lab
KMn04 with iron(II) ammonium sulphate hexahydrate-redox titration. 1-what is the purpose of adding H2SO4 to iron sample before the titration? 2-why is there no indicator used to determine the end point for this titration? 3-suggest another possible oxidising agent and reducing...
Monday, January 30, 2012 at 2:57am by yuni
Chemistry
Sorry that Mn is 2+ and I forgot to add that its a redox titration. Thanks!
Monday, September 3, 2007 at 4:29pm by Sven
Chemistry
Here is a good site. Post any questions as a follow up. http://dbhs.wvusd.k12.ca.us/webdocs/Redox/Redox-Rules.html
Tuesday, September 30, 2008 at 6:16pm by DrBob222
CHEM
For 1 and 3. Loss of electrons is oxidation; gain of electrons is reduction. But to do this you must know how to assign oxidation numbers to the elements on the left and right. Here is a site that shows you how to do that. Post again if you still have questions but be specific...
Friday, February 3, 2012 at 8:55pm by DrBob222
Chemistry
Assign oxidation numbers to each atom on each side and notice that the oxidation number does not change; i.e., Ca is +2 on the left and +2 on the right. Here is a good site to show how to determine oxidation numbers. Post if you still have questions but tell exactly what your ...
Saturday, January 26, 2013 at 5:23pm by DrBob222
chemistry
would the method of spectrophotometry or redox titration be a more accurate?
Monday, February 23, 2009 at 4:50pm by tiffany
chemistry(balance equation)
This is a redox equation and is best balanced by following redox rules. 3Cu + 8HNO3 ==> 3Cu(NO3)2 + 2NO + 4H2O http://www.chemteam.info/Redox/Redox.html
Thursday, January 19, 2012 at 9:54pm by DrBob222
chemistry
hello i'm doing a redox stoichiometry lab having to do with titration so we are given these two equations: 6 H + 3H2O2 + 2MnO4 ---> 4O2 + 2Mn + 6 H2O 6H + 5H2O2 + 2MnO4 --> 5O2 + 2Mn + 8 H2O it asks which reactant is the source of the O2 product in this ...
Thursday, March 31, 2011 at 11:13am by jewels
chem
Mn goes from +7 in MnO4- to +2 in Mn. Fe goes from +2 to +3. Here is a site all about redox and balancing redox equations. http://www.chemteam.info/Redox/Redox.html
Wednesday, April 11, 2012 at 6:22pm by DrBob222
Chemistry
Here is a good site that shows how to calculate the oxidation states and how to use them to balance a redox equation. http://www.chemteam.info/Redox/Redox.html
Sunday, January 8, 2012 at 11:40am by DrBob222
AP Chemistry
Here is a site that tells how to balance redox equatins AND it also will help if you require it for determining oxidations state etc. http://www.chemteam.info/Redox/Redox.html
Thursday, November 12, 2009 at 10:25pm by DrBob222
chemistry
Here are rules for balancing redox equations but if you will tell me where you are stuck I can help you through that part. http://www.chemteam.info/Redox/Redox.html
Monday, March 26, 2012 at 9:45pm by DrBob222
chemistry
You must have made some typos; I don't know anything about KMnos or CO3. Here are instructions for balancing a redox equation.http://www.chemteam.info/Redox/Redox.html
Tuesday, January 3, 2012 at 1:38pm by DrBob222
Chemistry
You need to learn how to do these. I can help but the most help is by practice. In a, V goes from +4 on the lef to +3 on the right. Here is a good site on redox including how to balance acidic and basic reactions. http://www.chemteam.info/Redox/Redox.html
Sunday, October 28, 2012 at 11:12pm by DrBob222
chemistry
How can you tell? Look at the oxidation state of the elements and compare oxidn state on the left with the oxdn state on the right. If they change it is a redox equation. If not it is not a redox equation. I'll do the first one. Ba is +2 to +2 N is +5 to +5 O is -2 to -2 H...
Wednesday, May 9, 2012 at 9:54pm by DrBob222
Chemistry 111
Anything you need to know about balancing redox equations is here. http://www.chemteam.info/Redox/Redox.html In this equation, Zn goes from zero to +2. N goes from +5 to -3.
Friday, December 2, 2011 at 8:14pm by DrBob222
Chemistry
Here you can find all you ever wanted to know about redox equations. http://www.chemteam.info/Redox/Redox.html Here is a hint to help get you started. Mo changes from +3 on the left to +6 on the right.
Sunday, December 2, 2012 at 1:17am by DrBob222
Chemistry
You need to learn to do these yourself. Here is a site that gives you almost anything you want to know about redox equation. Ask specific equations if you still need help. http://www.chemteam.info/Redox/Redox.html
Monday, November 19, 2012 at 3:09pm by DrBob222
college
Balancing redox equations follows a set of rules. Surely you have those rules. If not, here is a site to help you get started. Otherwise, what is it you don't understand about the process. http://www.chemteam.info/Redox/Redox.html
Sunday, August 8, 2010 at 8:16pm by DrBob222
Chemistry
MnO4^- ==> Mn^2+ H2O2 ==> O2 ----------------- Here is a site that shows you how to do this. Follow up with any questions regarding what you don't understand. To help you get started, Mn changes from +7 on the left to +2 on the right. O2 changes from -2 on ...
Friday, May 4, 2012 at 8:16am by DrBob222
Chemistry
Alcohol levels in blood can be determined by a redox titration with potassium dichromate according to the balanced equation: C2H5OH(aq) +2Cr2O7-2 (aq) + 16H+(aq)---> 2CO2 (g) + 4 Cr3+ (aq) + 11H2O (l) What is the blood alcohol level in mass perecent if 8.76 mL of 0....
Thursday, March 31, 2011 at 8:33pm by Renee
Chemistry
Alcohol levels in blood can be determined by a redox titration with potassium dichromate according to the balanced equation: C2H5OH(aq) + 2Cr2O7(-2) (aq) + 16H+(aq)---> 2CO2 (g) + 4 Cr3(+)(aq) + 11H2O (l) What is the blood alcohol level in mass perecent if 8.76 mL of 0....
Friday, March 26, 2010 at 9:01pm by Mary
Chemistry
How to balance redox equations. http://www.chemteam.info/Redox/Redox.html
Wednesday, May 2, 2012 at 10:48am by DrBob222
chemistry
I don't know the identity of HO2. The OH needs a minus sign (OH^-). Cr goes from +3 on the left to +6 on the right. I don't see a reduction but it may be the HO2 (could that be H2O2?). Here is a good site that shows you everything you may need to know about redox. http...
Saturday, April 2, 2011 at 3:31pm by DrBob222
Chemistry
Here is a site that will show you how to assign oxidation numbers to each element. Do that with each equation. Redox equations will have some that change oxidation state; non-redox will not. For example, the first one is a redox equation. Zn changes from zero on the left to +2...
Sunday, December 2, 2012 at 1:06am by DrBob222
Chem I
Do you know how to assign oxidation numbers? If not, here is a good site. Both reactions you have are redox reactions. http://www.chemteam.info/Redox/Redox-Rules.html
Monday, November 15, 2010 at 11:41pm by DrBob222
chemistry redox titration
calculate the volume of a 0.02M mno4- solution that is required to react completely with 10.0ml of 0.1M c2o4-2
Sunday, April 8, 2012 at 9:33pm by carla
chemistry redox titration
molarity times liters? but where would i get liters from?
Sunday, April 8, 2012 at 9:33pm by carla
Chemistry
Zn + OH^- ==> Zn(OH)4^- + 2e 6H2O + NO3^- + 8e ==>NH3 + 9OH^- Here is a site that you can access for rules for assigning oxidation states up to an including how to balance redox equations (and half reactions). http://www.chemteam.info/Redox/Redox.html
Tuesday, May 18, 2010 at 11:07am by DrBob222
Chemistry
You need to learn how to do these yourself. The link below will help do anything you want to do with redox equations and this hint will help you get started. Fe changes from an oxidation state of +2 (each) on the left to +3(each) on the right. Mn changes from +7 on the left to...
Saturday, November 10, 2012 at 11:20pm by DrBob222
chemistry
The amount of Fe in a 2.0008 g sample of an iron ore was determined by a redox titration with K2Cr2O7. The sample was dissolved in HCl and the iron brought to a +2 oxidation state. Titration required 26.48 mL of 0.034 M K2Cr2O7. Calculate the iron content as %w/w Fe2O3. Cr2O72...
Wednesday, February 15, 2012 at 5:17pm by darren
chemistry
This site is a good redox site. http://www.chemteam.info/Redox/Redox.html
Tuesday, February 14, 2012 at 10:00pm by DrBob222
chemistry
Here is a site that gives a great deal of information about balancing redox equations. http://www.chemteam.info/Redox/Redox.html Hint: Mn changes from an oxidation state of +7 on the left to +2 on the right. Zn changes from zero on the left to +2 on the right.
Tuesday, November 27, 2012 at 2:53pm by DrBob222
chemistry
Here is a set of rules for balancing half reactions in both acid and basic solutions. http://www.chemteam.info/Redox/Redox.html
Sunday, October 7, 2012 at 1:21am by DrBob222
Chem
Here are the rules. Let me know if you need clarification or post your results and I'll be glad to check them. http://www.chemteam.info/Redox/Redox.html
Sunday, May 9, 2010 at 9:51pm by DrBob222
chemistry
I can tell you with some assurance that you will never balance chromate by using sulfite to sulfate. Here is a web site that will help you. http://www.chemteam.info/Redox/Redox.html
Monday, February 13, 2012 at 7:51pm by DrBob222
chemistry
If you don't know how to determine oxidation numbers you will have a tough time balancing redox equations. Here is a good site. http://dbhs.wvusd.k12.ca.us/webdocs/Redox/Redox-Rules.html
Friday, October 31, 2008 at 11:26pm by DrBob222
chemistry
Here are instructions for balancing redox equations. Here are some hints to get you started. Cr changes from +6 for each atom on the left to +3 on the right. S changes from +4 on the left to +6 on the right. http://www.chemteam.info/Redox/Redox.html
Monday, April 4, 2011 at 12:55am by DrBob222
Chemistry
You need to learn how to do these yourself. Here is a good site that covers all the basics of redox equations. I can help get you started. Mn changes from an oxidation state of +7 on the left to +2 on the right. C changes from +3 for EACH C on the left to +4 each on the right...
Wednesday, November 14, 2012 at 3:12pm by DrBob222
chemistry redox titration
Read the problem. mols oxalate = M x L M = 0.1M volume = 10.0mL = 0.010 L big as life right there in the problem.
Sunday, April 8, 2012 at 9:33pm by DrBob222
chem
Here are several links that may help. http://www.chemteam.info/Redox/Redox.html
Tuesday, November 15, 2011 at 8:08pm by DrBob222
chemistry
Here is a site that explains how to do it. Memorize the set procedure. http://www.chemteam.info/Redox/Redox.html Post any question you have about the procedure.
Friday, February 24, 2012 at 5:09pm by DrBob222
Chemistry
You need the practice of doing these. H is+1, Cl is -1, N is +5 in HNO3 and O is -2. I'll leave the others for you. Here is a site that should help if you have trouble. http://www.chemteam.info/Redox/Redox-Rules.html
Saturday, September 22, 2012 at 10:28pm by DrBob222
Chemistry
You need to learn to do these yourself; here is a site that will tell you everything you've ever wanted to know about balancing redox equations. I will help get you started. I would start by balancing the Cl03^- + Cl^- ==> Cl2 Then balance Cl^- ==> ClO2. ...
Sunday, December 2, 2012 at 8:07pm by DrBob222
chem grade 12
Here is a good site to learn how to do these. Oxygen is -2 for each atom. http://www.chemteam.info/Redox/Redox-Rules.html
Tuesday, January 31, 2012 at 9:49pm by DrBob222
Chemistry
I would call V +5 and N -3. Mn is +7 and oxygen is -2. Here is a good web site. http://www.chemteam.info/Redox/Redox-Rules.html
Friday, January 13, 2012 at 5:10pm by DrBob222
anaytical chemistry
experiment: potentiomeric titration 1. Why is continuos stirring (use of stirrer and magnetic stir bar)important in potentiometric titration? 2. Why should the increments of addition of titrant be narrowed down as the titration approaches the equivalence point? 3. What are the...
Sunday, September 2, 2007 at 4:46pm by :kkk:
General Chem II
http://www.chemteam.info/Redox/Redox.html
Wednesday, March 9, 2011 at 8:12pm by DrBob222
Chemistry
You need to know how to do this; therefore, please tell me what trouble you're having. I expect you know more about this than you think. Here is a site to show you how to do oxidation states. http://www.chemteam.info/Redox/Redox-Rules.html
Wednesday, July 18, 2012 at 7:35pm by DrBob222
AP Chemistry
You need to learn how to do these without my help. Here is a site that very good with redox methodology. To give you a hint and help you through the laborious work, I can tell you that BOTH I atoms change from zero on the left to -2 total on the right. S changes from +8 for ...
Friday, October 26, 2012 at 2:43pm by DrBob222
Chem 1A
You need to learn to do these by yourself. Here is a good site that will talk about all of the things you need to know to balance redox equations. http://www.chemteam.info/Redox/Redox.html Here is something that will help you get started. N changes from and oxidation state of...
Monday, November 12, 2012 at 5:41pm by DrBob222
Chem
In the equation Mn goes from +7 to +2 and As goes from +3 to +5. That should give you the information to balance. Here is a site that may help but please re-post if you have a more detailed question about the procedure. http://www.chemteam.info/Redox/Redox.html
Tuesday, February 22, 2011 at 8:22pm by DrBob222
geochemistry
You need to learn to do these. Here is a link that will get you started. It won't balance without a little nudge here and there. 20CH2O (aq) + 16NO3^- + 6H^+ ---> 8N2 + 10HCO3^- + 10CO2(g) + 18H2O http://www.chemteam.info/Redox/Redox.html
Thursday, March 14, 2013 at 12:29am by DrBob222
chemistry
Here is a good site for the rules for determining oxidation state. I'll me glad to check your assignment. http://www.chemteam.info/Redox/Redox-Rules.html
Saturday, June 12, 2010 at 9:21pm by DrBob222
Chem 112
http://www.chemteam.info/Redox/Redox-Rules.html I'll be happy to check your answers.
Thursday, April 12, 2012 at 4:43pm by DrBob222
chem
Here is a site that gives some rules for determining the oxidation state of an element. http://www.chemteam.info/Redox/Redox-Rules.html
Sunday, October 25, 2009 at 9:13pm by DrBob222
analytical chemistry
http://www.chemteam.info/Redox/Redox.html
Thursday, February 14, 2013 at 8:27pm by DrBob222
Inorganic chemistry
http://www.chemteam.info/Redox/Redox.html
Sunday, December 16, 2012 at 5:52am by DrBob222
chemistry
Here is a simplified list or rules for determining the oxidation state. http://www.chemteam.info/Redox/Redox-Rules.html Zn is +2, P is +5, O is -2
Thursday, September 30, 2010 at 10:12pm by DrBob222
chemistry
S is +4 and not -2 O is -2, correct. BUT Ag is +1. Remember a compound is zero; therefore, 3 O at -2 each is -6, S is +4, which makes 2Ag +2 or +1 each. You are on the money for NaClO4. Na is +1 Cl is +7 Each O is -2. Here is a good site if you need the rules. http://www....
Tuesday, September 28, 2010 at 11:04pm by DrBob222
Chemistry
Here is a better page. http://www.chemteam.info/Redox/Redox-Rules.html
Sunday, April 12, 2009 at 11:26am by DrBob222
chemistry
Here is a site that will help you balance this if that is your question. Here are some hints also. Mn changes from +7 to +2 N (in KNO2) changes from +3 to +5(in KNO3). http://www.chemteam.info/Redox/Redox.html
Friday, May 18, 2012 at 11:05pm by DrBob222
Chemistry
Minimal but simple rules to live by for redox. Oxidation numbers are nothing more than a book keeping method. http://dbhs.wvusd.k12.ca.us/webdocs/Redox/Meaning-of-Redox.html http://dbhs.wvusd.k12.ca.us/webdocs/Redox/Redox-Rules.html
Sunday, February 10, 2008 at 8:20pm by DrBob222
Chemistry
What's the trouble. Cr goes from +6 for EACH Cr atom to +3. Br goes from -1 to 0. Here is a site that tells you how to do it but I can help if you identify the problem. http://www.chemteam.info/Redox/Redox.html
Friday, February 24, 2012 at 11:25pm by DrBob222
Chemistry
NaOH + HCl ==> NaCl + H2O is a non-redox equation. Specifically it i an acid/base equation. But you see I have 1 Na, 1 O, 1 Cl, an 2H atoms on each side. KMnO4 + 5FeCl2 + 8HCl ==> 5FeCl3 + MnCl2 + 4H2O + KCl You see I have 1 K, 1 Mn, 4 O, 5 Fe, and 18 Cl atoms on...
Friday, October 12, 2012 at 12:03am by DrBob222
Chem Lab
Suggest another possible oxidising agent and reducing agent that can be used to replace potassium permanganate & iron (II) ammonium sulphate haxahydrate in experiment Redox Titration
Thursday, February 9, 2012 at 12:08am by Wei AZ
chmistry
http://www.chemteam.info/Redox/Redox.html
Thursday, February 14, 2013 at 10:26am by DrBob222
Chemistry
http://www.chemteam.info/Redox/Redox.html
Tuesday, February 12, 2013 at 9:23pm by DrBob222
chemistry
http://www.chemteam.info/Redox/Redox.html
Friday, April 27, 2012 at 10:23am by DrBob222
chemistry
http://www.chemteam.info/Redox/Redox.html
Friday, April 27, 2012 at 10:23am by DrBob222
Chemistry
http://www.chemteam.info/Redox/Redox.html
Monday, April 16, 2012 at 11:12am by DrBob222
Chemistry
http://www.chemteam.info/Redox/Redox.html
Saturday, April 14, 2012 at 8:06pm by DrBob222
chem
http://www.chemteam.info/Redox/Redox.html
Wednesday, May 25, 2011 at 12:47pm by DrBob222
chemistry
http://www.chemteam.info/Redox/Redox.html
Thursday, January 13, 2011 at 10:08am by DrBob222
Physical sciences
Rules for determining oxidation number. http://www.chemteam.info/Redox/Redox-Rules.html
Friday, October 30, 2009 at 7:44pm by DrBob222
chemistry
You need to learn how to determine this. Here is a set of rules that will allow you to determine the oxidation state of each element in each equation. Then you can answer the question. http://www.chemteam.info/Redox/Redox-Rules.html
Sunday, November 28, 2010 at 7:45pm by DrBob222
chemistry
It isn't one of those. It's a redox equation. Some redox equations are more than one; i.e., C + O2 ==> CO2 is a combustion reaction, it is a synthesis reaction and it is a redox reaction. The four types you mention are the four common ones used to introduce ...
Sunday, February 26, 2012 at 3:57pm by DrBob222
chemistry
These are far to detailed to do them justice on the web. Here is a site that explains how to balance redox equations. http://www.chemteam.info/Redox/Redox.html I can help a little by getting you started. Mg changes from zero on the left to +2 on the right. Au changes from +1 ...
Wednesday, February 8, 2012 at 11:18pm by DrBob222
chemistry
S is +6. O is -2 Here is a simplified set of rules. http://www.chemteam.info/Redox/Redox-Rules.html
Thursday, September 30, 2010 at 8:35pm by DrBob222
Chemisty
Cl changes from +5 to -1. As changes from +3 to +5. http://www.chemteam.info/Redox/Redox.html
Sunday, April 22, 2012 at 9:06pm by DrBob222
chemistry
Try 6. http://www.chemteam.info/Redox/Redox-Rules.html
Sunday, September 5, 2010 at 11:14am by DrBob222
chemistry
I do these this way. First, I keep H and O "normal" if I can and let C change to whatever I need. The formula becomes C3H6O2 H = +1 each x 6 = +6 O = -2 each x 2 = -4 Which means C must be -2 for three of them or -2/3 each to make the compound zero (and all compounds...
Wednesday, April 27, 2011 at 4:57pm by DrBob222
11th grade CHEMISTRY TITRATION LAB!
weiirrdd .. i'm in grade 11 with a titration lab due the same day and i had the same questions .. i never handed it in today so i get 5% off . but what did you end up writing for your purpose and hypothesis ?
Sunday, December 14, 2008 at 8:56pm by COOLKID!
11th grade CHEMISTRY TITRATION LAB!
weiirrdd .. i'm in grade 11 with a titration lab due the same day and i had the same questions .. i never handed it in today so i get 5% off . but what did you end up writing for your purpose and hypothesis ?
Sunday, December 14, 2008 at 8:56pm by COOLKID!
chemistry
http://www.chemteam.info/Redox/Redox.html Hint: Cr is +6 on the left and +3 on the right. N is +2 on the left and +5 on the right.
Friday, April 19, 2013 at 4:25pm by DrBob222
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